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Introduce flags for reserve_bootmem()

Browse source 
This patchset adds a flags variable to reserve_bootmem() and uses the
BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions
between crashkernel area and already used memory.

This patch:

Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE.
If that flag is set, the function returns with -EBUSY if the memory already
has been reserved in the past.  This is to avoid conflicts.

Because that code runs before SMP initialisation, there's no race condition
inside reserve_bootmem_core().

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix powerpc build]
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: <linux-arch@vger.kernel.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bernhard Walle 2008-02-07 00:15:17 -08:00 committed by Linus Torvalds
parent 25fad945a7
commit 72a7fe3967
43 changed files with 183 additions and 105 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
arch/alpha/kernel/core_irongate.c
View file

@ -241,7 +241,8 @@ albacore_init_arch(void)
size / 1024);
}
#endif
reserve_bootmem_node(NODE_DATA(0), pci_mem, memtop - pci_mem);
reserve_bootmem_node(NODE_DATA(0), pci_mem, memtop -
pci_mem, BOOTMEM_DEFAULT);
printk("irongate_init_arch: temporarily reserving "
"region %08lx-%08lx for PCI\n", pci_mem, memtop - 1);
}

5
arch/alpha/kernel/setup.c
View file

@ -428,7 +428,8 @@ setup_memory(void *kernel_end)
}
/* Reserve the bootmap memory. */
reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size);
reserve_bootmem(PFN_PHYS(bootmap_start), bootmap_size,
BOOTMEM_DEFAULT);
printk("reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
#ifdef CONFIG_BLK_DEV_INITRD
@ -446,7 +447,7 @@ setup_memory(void *kernel_end)
phys_to_virt(PFN_PHYS(max_low_pfn)));
} else {
reserve_bootmem(virt_to_phys((void *)initrd_start),
INITRD_SIZE);
INITRD_SIZE, BOOTMEM_DEFAULT);
}
}
#endif /* CONFIG_BLK_DEV_INITRD */

5
arch/alpha/mm/numa.c
View file

@ -242,7 +242,8 @@ setup_memory_node(int nid, void *kernel_end)
}
/* Reserve the bootmap memory. */
reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(bootmap_start), bootmap_size);
reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(bootmap_start),
bootmap_size, BOOTMEM_DEFAULT);
printk(" reserving pages %ld:%ld\n", bootmap_start, bootmap_start+PFN_UP(bootmap_size));
node_set_online(nid);
@ -281,7 +282,7 @@ setup_memory(void *kernel_end)
nid = kvaddr_to_nid(initrd_start);
reserve_bootmem_node(NODE_DATA(nid),
virt_to_phys((void *)initrd_start),
INITRD_SIZE);
INITRD_SIZE, BOOTMEM_DEFAULT);
}
}
#endif /* CONFIG_BLK_DEV_INITRD */

4
arch/arm/mm/init.c
View file

@ -239,7 +239,7 @@ bootmem_init_node(int node, int initrd_node, struct meminfo *mi)
* Reserve the bootmem bitmap for this node.
*/
reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT,
boot_pages << PAGE_SHIFT);
boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
#ifdef CONFIG_BLK_DEV_INITRD
/*
@ -247,7 +247,7 @@ bootmem_init_node(int node, int initrd_node, struct meminfo *mi)
*/
if (node == initrd_node) {
reserve_bootmem_node(pgdat, phys_initrd_start,
phys_initrd_size);
phys_initrd_size, BOOTMEM_DEFAULT);
initrd_start = __phys_to_virt(phys_initrd_start);
initrd_end = initrd_start + phys_initrd_size;
}

17
arch/arm/mm/mmu.c
View file

@ -605,9 +605,11 @@ void __init reserve_node_zero(pg_data_t *pgdat)
* Note that this can only be in node 0.
*/
#ifdef CONFIG_XIP_KERNEL
reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start);
reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start,
BOOTMEM_DEFAULT);
#else
reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext);
reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext,
BOOTMEM_DEFAULT);
#endif
/*
@ -615,7 +617,7 @@ void __init reserve_node_zero(pg_data_t *pgdat)
* and can only be in node 0.
*/
reserve_bootmem_node(pgdat, __pa(swapper_pg_dir),
PTRS_PER_PGD * sizeof(pgd_t));
PTRS_PER_PGD * sizeof(pgd_t), BOOTMEM_DEFAULT);
/*
* Hmm... This should go elsewhere, but we really really need to
@ -638,8 +640,10 @@ void __init reserve_node_zero(pg_data_t *pgdat)
/* H1940 and RX3715 need to reserve this for suspend */
if (machine_is_h1940() || machine_is_rx3715()) {
reserve_bootmem_node(pgdat, 0x30003000, 0x1000);
reserve_bootmem_node(pgdat, 0x30081000, 0x1000);
reserve_bootmem_node(pgdat, 0x30003000, 0x1000,
BOOTMEM_DEFAULT);
reserve_bootmem_node(pgdat, 0x30081000, 0x1000,
BOOTMEM_DEFAULT);
}
#ifdef CONFIG_SA1111
@ -650,7 +654,8 @@ void __init reserve_node_zero(pg_data_t *pgdat)
res_size = __pa(swapper_pg_dir) - PHYS_OFFSET;
#endif
if (res_size)
reserve_bootmem_node(pgdat, PHYS_OFFSET, res_size);
reserve_bootmem_node(pgdat, PHYS_OFFSET, res_size,
BOOTMEM_DEFAULT);
}
/*

9
arch/arm/mm/nommu.c
View file

@ -27,9 +27,11 @@ void __init reserve_node_zero(pg_data_t *pgdat)
* Note that this can only be in node 0.
*/
#ifdef CONFIG_XIP_KERNEL
reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start);
reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start,
BOOTMEM_DEFAULT);
#else
reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext);
reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext,
BOOTMEM_DEFAULT);
#endif
/*
@ -37,7 +39,8 @@ void __init reserve_node_zero(pg_data_t *pgdat)
* some architectures which the DRAM is the exception vector to trap,
* alloc_page breaks with error, although it is not NULL, but "0."
*/
reserve_bootmem_node(pgdat, CONFIG_VECTORS_BASE, PAGE_SIZE);
reserve_bootmem_node(pgdat, CONFIG_VECTORS_BASE, PAGE_SIZE,
BOOTMEM_DEFAULT);
}
/*

2
arch/arm/plat-omap/fb.c
View file

@ -207,7 +207,7 @@ void __init omapfb_reserve_sdram(void)
return;
}
if (rg.paddr)
reserve_bootmem(rg.paddr, rg.size);
reserve_bootmem(rg.paddr, rg.size, BOOTMEM_DEFAULT);
reserved += rg.size;
omapfb_config.mem_desc.region[i] = rg;
configured_regions++;

6
arch/avr32/kernel/setup.c
View file

@ -489,7 +489,8 @@ static void __init setup_bootmem(void)
/* Reserve space for the bootmem bitmap... */
reserve_bootmem_node(NODE_DATA(node),
PFN_PHYS(bootmap_pfn),
bootmap_size);
bootmap_size,
BOOTMEM_DEFAULT);
/* ...and any other reserved regions. */
for (res = reserved; res; res = res->sibling) {
@ -505,7 +506,8 @@ static void __init setup_bootmem(void)
&& res->end < PFN_PHYS(max_pfn))
reserve_bootmem_node(
NODE_DATA(node), res->start,
res->end - res->start + 1);
res->end - res->start + 1,
BOOTMEM_DEFAULT);
}
node_set_online(node);

2
arch/blackfin/kernel/setup.c
View file

@ -406,7 +406,7 @@ void __init setup_arch(char **cmdline_p)
*/
free_bootmem(memory_start, memory_end - memory_start);
reserve_bootmem(memory_start, bootmap_size);
reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
/*
* get kmalloc into gear
*/

2
arch/cris/kernel/setup.c
View file

@ -137,7 +137,7 @@ setup_arch(char **cmdline_p)
* Arguments are start, size
*/
reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size);
reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT);
/* paging_init() sets up the MMU and marks all pages as reserved */

16
arch/frv/kernel/setup.c
View file

@ -925,13 +925,15 @@ static void __init setup_linux_memory(void)
#endif
/* take back the memory occupied by the kernel image and the bootmem alloc map */
reserve_bootmem(kstart, kend - kstart + bootmap_size);
reserve_bootmem(kstart, kend - kstart + bootmap_size,
BOOTMEM_DEFAULT);
/* reserve the memory occupied by the initial ramdisk */
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (low_top_pfn << PAGE_SHIFT)) {
reserve_bootmem(INITRD_START, INITRD_SIZE);
reserve_bootmem(INITRD_START, INITRD_SIZE,
BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET;
initrd_end = initrd_start + INITRD_SIZE;
}
@ -986,9 +988,10 @@ static void __init setup_uclinux_memory(void)
/* now take back the bits the core kernel is occupying */
#ifndef CONFIG_PROTECT_KERNEL
reserve_bootmem(kend, bootmap_size);
reserve_bootmem(kend, bootmap_size, BOOTMEM_DEFAULT);
reserve_bootmem((unsigned long) &__kernel_image_start,
kend - (unsigned long) &__kernel_image_start);
kend - (unsigned long) &__kernel_image_start,
BOOTMEM_DEFAULT);
#else
dampr = __get_DAMPR(0);
@ -996,14 +999,15 @@ static void __init setup_uclinux_memory(void)
dampr = (dampr >> 4) + 17;
dampr = 1 << dampr;
reserve_bootmem(__get_DAMPR(0) & xAMPRx_PPFN, dampr);
reserve_bootmem(__get_DAMPR(0) & xAMPRx_PPFN, dampr, BOOTMEM_DEFAULT);
#endif
/* reserve some memory to do uncached DMA through if requested */
#ifdef CONFIG_RESERVE_DMA_COHERENT
if (dma_coherent_mem_start)
reserve_bootmem(dma_coherent_mem_start,
dma_coherent_mem_end - dma_coherent_mem_start);
dma_coherent_mem_end - dma_coherent_mem_start,
BOOTMEM_DEFAULT);
#endif
} /* end setup_uclinux_memory() */

2
arch/h8300/kernel/setup.c
View file

@ -173,7 +173,7 @@ void __init setup_arch(char **cmdline_p)
* the bootmem bitmap so we then reserve it after freeing it :-)
*/
free_bootmem(memory_start, memory_end - memory_start);
reserve_bootmem(memory_start, bootmap_size);
reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
/*
* get kmalloc into gear
*/

2
arch/ia64/mm/contig.c
View file

@ -218,7 +218,7 @@ find_memory (void)
/* Free all available memory, then mark bootmem-map as being in use. */
efi_memmap_walk(filter_rsvd_memory, free_bootmem);
reserve_bootmem(bootmap_start, bootmap_size);
reserve_bootmem(bootmap_start, bootmap_size, BOOTMEM_DEFAULT);
find_initrd();

4
arch/ia64/mm/discontig.c
View file

@ -299,12 +299,12 @@ static void __init reserve_pernode_space(void)
pages = bdp->node_low_pfn - (bdp->node_boot_start>>PAGE_SHIFT);
size = bootmem_bootmap_pages(pages) << PAGE_SHIFT;
base = __pa(bdp->node_bootmem_map);
reserve_bootmem_node(pdp, base, size);
reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT);
/* Now the per-node space */
size = mem_data[node].pernode_size;
base = __pa(mem_data[node].pernode_addr);
reserve_bootmem_node(pdp, base, size);
reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT);
}
}

11
arch/m32r/kernel/setup.c
View file

@ -177,25 +177,28 @@ static unsigned long __init setup_memory(void)
*/
reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE,
(PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1)
- CONFIG_MEMORY_START);
- CONFIG_MEMORY_START,
BOOTMEM_DEFAULT);
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE);
reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE, BOOTMEM_DEFAULT);
/*
* reserve memory hole
*/
#ifdef CONFIG_MEMHOLE
reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE);
reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE,
BOOTMEM_DEFAULT);
#endif
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
reserve_bootmem(INITRD_START, INITRD_SIZE);
reserve_bootmem(INITRD_START, INITRD_SIZE,
BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET;
initrd_end = initrd_start + INITRD_SIZE;
printk("initrd:start[%08lx],size[%08lx]\n",

5
arch/m32r/mm/discontig.c
View file

@ -91,7 +91,8 @@ unsigned long __init setup_memory(void)
PFN_PHYS(mp->pages));
reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size);
PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size,
BOOTMEM_DEFAULT);
if (max_low_pfn < max_pfn)
max_low_pfn = max_pfn;
@ -104,7 +105,7 @@ unsigned long __init setup_memory(void)
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
reserve_bootmem_node(NODE_DATA(0), INITRD_START,
INITRD_SIZE);
INITRD_SIZE, BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET;
initrd_end = initrd_start + INITRD_SIZE;
printk("initrd:start[%08lx],size[%08lx]\n",

2
arch/m68k/atari/stram.c
View file

@ -154,7 +154,7 @@ void __init atari_stram_reserve_pages(void *start_mem)
/* always reserve first page of ST-RAM, the first 2 kB are
* supervisor-only! */
if (!kernel_in_stram)
reserve_bootmem (0, PAGE_SIZE);
reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT);
}

3
arch/m68k/kernel/setup.c
View file

@ -323,7 +323,8 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_BLK_DEV_INITRD
if (m68k_ramdisk.size) {
reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
m68k_ramdisk.addr, m68k_ramdisk.size);
m68k_ramdisk.addr, m68k_ramdisk.size,
BOOTMEM_DEFAULT);
initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
initrd_end = initrd_start + m68k_ramdisk.size;
printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);

2
arch/m68knommu/kernel/setup.c
View file

@ -203,7 +203,7 @@ void __init setup_arch(char **cmdline_p)
* the bootmem bitmap so we then reserve it after freeing it :-)
*/
free_bootmem(memory_start, memory_end - memory_start);
reserve_bootmem(memory_start, bootmap_size);
reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
/*
* Get kmalloc into gear.

4
arch/mips/kernel/setup.c
View file

@ -232,7 +232,7 @@ static void __init finalize_initrd(void)
goto disable;
}
reserve_bootmem(__pa(initrd_start), size);
reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
initrd_below_start_ok = 1;
printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n",
@ -413,7 +413,7 @@ static void __init bootmem_init(void)
/*
* Reserve the bootmap memory.
*/
reserve_bootmem(PFN_PHYS(mapstart), bootmap_size);
reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT);
/*
* Reserve initrd memory if needed.

3
arch/mips/sgi-ip27/ip27-memory.c
View file

@ -465,7 +465,8 @@ static void __init node_mem_init(cnodeid_t node)
free_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT,
(slot_lastpfn - slot_firstpfn) << PAGE_SHIFT);
reserve_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT,
((slot_freepfn - slot_firstpfn) << PAGE_SHIFT) + bootmap_size);
((slot_freepfn - slot_firstpfn) << PAGE_SHIFT) + bootmap_size,
BOOTMEM_DEFAULT);
}
/*

14
arch/parisc/mm/init.c
View file

@ -315,11 +315,13 @@ static void __init setup_bootmem(void)
#define PDC_CONSOLE_IO_IODC_SIZE 32768
reserve_bootmem_node(NODE_DATA(0), 0UL,
(unsigned long)(PAGE0->mem_free + PDC_CONSOLE_IO_IODC_SIZE));
(unsigned long)(PAGE0->mem_free +
PDC_CONSOLE_IO_IODC_SIZE), BOOTMEM_DEFAULT);
reserve_bootmem_node(NODE_DATA(0), __pa((unsigned long)_text),
(unsigned long)(_end - _text));
(unsigned long)(_end - _text), BOOTMEM_DEFAULT);
reserve_bootmem_node(NODE_DATA(0), (bootmap_start_pfn << PAGE_SHIFT),
((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT));
((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT),
BOOTMEM_DEFAULT);
#ifndef CONFIG_DISCONTIGMEM
@ -328,7 +330,8 @@ static void __init setup_bootmem(void)
for (i = 0; i < npmem_holes; i++) {
reserve_bootmem_node(NODE_DATA(0),
(pmem_holes[i].start_pfn << PAGE_SHIFT),
(pmem_holes[i].pages << PAGE_SHIFT));
(pmem_holes[i].pages << PAGE_SHIFT),
BOOTMEM_DEFAULT);
}
#endif
@ -346,7 +349,8 @@ static void __init setup_bootmem(void)
initrd_below_start_ok = 1;
printk(KERN_INFO "initrd: reserving %08lx-%08lx (mem_max %08lx)\n", __pa(initrd_start), __pa(initrd_start) + initrd_reserve, mem_max);
reserve_bootmem_node(NODE_DATA(0),__pa(initrd_start), initrd_reserve);
reserve_bootmem_node(NODE_DATA(0), __pa(initrd_start),
initrd_reserve, BOOTMEM_DEFAULT);
}
}
#endif

8
arch/powerpc/mm/mem.c
View file

@ -220,12 +220,13 @@ void __init do_init_bootmem(void)
lmb_size_bytes(&lmb.reserved, i) - 1;
if (addr < total_lowmem)
reserve_bootmem(lmb.reserved.region[i].base,
lmb_size_bytes(&lmb.reserved, i));
lmb_size_bytes(&lmb.reserved, i),
BOOTMEM_DEFAULT);
else if (lmb.reserved.region[i].base < total_lowmem) {
unsigned long adjusted_size = total_lowmem -
lmb.reserved.region[i].base;
reserve_bootmem(lmb.reserved.region[i].base,
adjusted_size);
adjusted_size, BOOTMEM_DEFAULT);
}
}
#else
@ -234,7 +235,8 @@ void __init do_init_bootmem(void)
/* reserve the sections we're already using */
for (i = 0; i < lmb.reserved.cnt; i++)
reserve_bootmem(lmb.reserved.region[i].base,
lmb_size_bytes(&lmb.reserved, i));
lmb_size_bytes(&lmb.reserved, i),
BOOTMEM_DEFAULT);
#endif
/* XXX need to clip this if using highmem? */

2
arch/powerpc/mm/numa.c
View file

@ -675,7 +675,7 @@ void __init do_init_bootmem(void)
dbg("reserve_bootmem %lx %lx\n", physbase,
size);
reserve_bootmem_node(NODE_DATA(nid), physbase,
size);
size, BOOTMEM_DEFAULT);
}
}

11
arch/s390/kernel/setup.c
View file

@ -649,21 +649,24 @@ setup_memory(void)
/*
* Reserve memory used for lowcore/command line/kernel image.
*/
reserve_bootmem(0, (unsigned long)_ehead);
reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT);
reserve_bootmem((unsigned long)_stext,
PFN_PHYS(start_pfn) - (unsigned long)_stext);
PFN_PHYS(start_pfn) - (unsigned long)_stext,
BOOTMEM_DEFAULT);
/*
* Reserve the bootmem bitmap itself as well. We do this in two
* steps (first step was init_bootmem()) because this catches
* the (very unlikely) case of us accidentally initializing the
* bootmem allocator with an invalid RAM area.
*/
reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size);
reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size,
BOOTMEM_DEFAULT);
#ifdef CONFIG_BLK_DEV_INITRD
if (INITRD_START && INITRD_SIZE) {
if (INITRD_START + INITRD_SIZE <= memory_end) {
reserve_bootmem(INITRD_START, INITRD_SIZE);
reserve_bootmem(INITRD_START, INITRD_SIZE,
BOOTMEM_DEFAULT);
initrd_start = INITRD_START;
initrd_end = initrd_start + INITRD_SIZE;
} else {

10
arch/sh/kernel/setup.c
View file

@ -148,7 +148,8 @@ static void __init reserve_crashkernel(void)
(unsigned long)(free_mem >> 20));
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
reserve_bootmem(crash_base, crash_size);
reserve_bootmem(crash_base, crash_size,
BOOTMEM_DEFAULT);
} else
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");
@ -184,13 +185,14 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
* an invalid RAM area.
*/
reserve_bootmem(__MEMORY_START+PAGE_SIZE,
(PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
(PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START,
BOOTMEM_DEFAULT);
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
reserve_bootmem(__MEMORY_START, PAGE_SIZE);
reserve_bootmem(__MEMORY_START, PAGE_SIZE, BOOTMEM_DEFAULT);
sparse_memory_present_with_active_regions(0);
@ -200,7 +202,7 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
reserve_bootmem(INITRD_START + __MEMORY_START,
INITRD_SIZE);
INITRD_SIZE, BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET +
__MEMORY_START;
initrd_end = initrd_start + INITRD_SIZE;

4
arch/sh/mm/numa.c
View file

@ -80,9 +80,9 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
/* Reserve the pgdat and bootmap space with the bootmem allocator */
reserve_bootmem_node(NODE_DATA(nid), start_pfn << PAGE_SHIFT,
sizeof(struct pglist_data));
sizeof(struct pglist_data), BOOTMEM_DEFAULT);
reserve_bootmem_node(NODE_DATA(nid), free_pfn << PAGE_SHIFT,
bootmap_pages << PAGE_SHIFT);
bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
/* It's up */
node_set_online(nid);

6
arch/sparc/mm/init.c
View file

@ -259,7 +259,7 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
if (initrd_start) {
/* Reserve the initrd image area. */
size = initrd_end - initrd_start;
reserve_bootmem(initrd_start, size);
reserve_bootmem(initrd_start, size, BOOTMEM_DEFAULT);
*pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
@ -268,7 +268,7 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
#endif
/* Reserve the kernel text/data/bss. */
size = (start_pfn << PAGE_SHIFT) - phys_base;
reserve_bootmem(phys_base, size);
reserve_bootmem(phys_base, size, BOOTMEM_DEFAULT);
*pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
/* Reserve the bootmem map. We do not account for it
@ -276,7 +276,7 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
* in free_all_bootmem.
*/
size = bootmap_size;
reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size);
reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size, BOOTMEM_DEFAULT);
*pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
return max_pfn;

8
arch/sparc64/mm/init.c
View file

@ -997,7 +997,7 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail,
prom_printf("reserve_bootmem(initrd): base[%llx] size[%lx]\n",
initrd_start, initrd_end);
#endif
reserve_bootmem(initrd_start, size);
reserve_bootmem(initrd_start, size, BOOTMEM_DEFAULT);
initrd_start += PAGE_OFFSET;
initrd_end += PAGE_OFFSET;
@ -1007,7 +1007,7 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail,
#ifdef CONFIG_DEBUG_BOOTMEM
prom_printf("reserve_bootmem(kernel): base[%lx] size[%lx]\n", kern_base, kern_size);
#endif
reserve_bootmem(kern_base, kern_size);
reserve_bootmem(kern_base, kern_size, BOOTMEM_DEFAULT);
*pages_avail -= PAGE_ALIGN(kern_size) >> PAGE_SHIFT;
/* Add back in the initmem pages. */
@ -1024,7 +1024,7 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail,
prom_printf("reserve_bootmem(bootmap): base[%lx] size[%lx]\n",
(bootmap_pfn << PAGE_SHIFT), size);
#endif
reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size);
reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size, BOOTMEM_DEFAULT);
for (i = 0; i < pavail_ents; i++) {
unsigned long start_pfn, end_pfn;
@ -1489,7 +1489,7 @@ static void __init taint_real_pages(void)
goto do_next_page;
}
}
reserve_bootmem(old_start, PAGE_SIZE);
reserve_bootmem(old_start, PAGE_SIZE, BOOTMEM_DEFAULT);
do_next_page:
old_start += PAGE_SIZE;

3
arch/v850/kernel/anna.c
View file

@ -85,7 +85,8 @@ void __init mach_reserve_bootmem ()
/* The space between SRAM and SDRAM is filled with duplicate
images of SRAM. Prevent the kernel from using them. */
reserve_bootmem (SRAM_ADDR + SRAM_SIZE,
SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE));
SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE),
BOOTMEM_DEFAULT);
}
void mach_gettimeofday (struct timespec *tv)

3
arch/v850/kernel/as85ep1.c
View file

@ -116,7 +116,8 @@ void __init mach_reserve_bootmem ()
if (SDRAM_ADDR < RAM_END && SDRAM_ADDR > RAM_START)
/* We can't use the space between SRAM and SDRAM, so
prevent the kernel from trying. */
reserve_bootmem (SRAM_END, SDRAM_ADDR - SRAM_END);
reserve_bootmem(SRAM_END, SDRAM_ADDR - SRAM_END,
BOOTMEM_DEFAULT);
}
void mach_gettimeofday (struct timespec *tv)

6
arch/v850/kernel/rte_ma1_cb.c
View file

@ -46,13 +46,15 @@ void __init mach_reserve_bootmem ()
{
#ifdef CONFIG_RTE_CB_MULTI
/* Prevent the kernel from touching the monitor's scratch RAM. */
reserve_bootmem (MON_SCRATCH_ADDR, MON_SCRATCH_SIZE);
reserve_bootmem(MON_SCRATCH_ADDR, MON_SCRATCH_SIZE,
BOOTMEM_DEFAULT);
#endif
/* The space between SRAM and SDRAM is filled with duplicate
images of SRAM. Prevent the kernel from using them. */
reserve_bootmem (SRAM_ADDR + SRAM_SIZE,
SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE));
SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE),
BOOTMEM_DEFAULT);
}
void mach_gettimeofday (struct timespec *tv)

12
arch/v850/kernel/setup.c
View file

@ -241,15 +241,18 @@ init_bootmem_alloc (unsigned long ram_start, unsigned long ram_len)
if (kram_end > kram_start)
/* Reserve the RAM part of the kernel's address space, so it
doesn't get allocated. */
reserve_bootmem (kram_start, kram_end - kram_start);
reserve_bootmem(kram_start, kram_end - kram_start,
BOOTMEM_DEFAULT);
if (intv_in_ram && !intv_in_kram)
/* Reserve the interrupt vector space. */
reserve_bootmem (intv_start, intv_end - intv_start);
reserve_bootmem(intv_start, intv_end - intv_start,
BOOTMEM_DEFAULT);
if (bootmap >= ram_start && bootmap < ram_end)
/* Reserve the bootmap space. */
reserve_bootmem (bootmap, bootmap_len);
reserve_bootmem(bootmap, bootmap_len,
BOOTMEM_DEFAULT);
/* Reserve the memory used by the root filesystem image if it's
in RAM. */
@ -257,7 +260,8 @@ init_bootmem_alloc (unsigned long ram_start, unsigned long ram_len)
&& (unsigned long)&_root_fs_image_start >= ram_start
&& (unsigned long)&_root_fs_image_start < ram_end)
reserve_bootmem ((unsigned long)&_root_fs_image_start,
&_root_fs_image_end - &_root_fs_image_start);
&_root_fs_image_end - &_root_fs_image_start,
BOOTMEM_DEFAULT);
/* Let the platform-dependent code reserve some too. */
if (mrb)

6
arch/x86/kernel/mpparse_32.c
View file

@ -736,7 +736,8 @@ static int __init smp_scan_config (unsigned long base, unsigned long length)
smp_found_config = 1;
printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
mpf, virt_to_phys(mpf));
reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE);
reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE,
BOOTMEM_DEFAULT);
if (mpf->mpf_physptr) {
/*
* We cannot access to MPC table to compute
@ -751,7 +752,8 @@ static int __init smp_scan_config (unsigned long base, unsigned long length)
unsigned long end = max_low_pfn * PAGE_SIZE;
if (mpf->mpf_physptr + size > end)
size = end - mpf->mpf_physptr;
reserve_bootmem(mpf->mpf_physptr, size);
reserve_bootmem(mpf->mpf_physptr, size,
BOOTMEM_DEFAULT);
}
mpf_found = mpf;

18
arch/x86/kernel/setup_32.c
View file

@ -390,7 +390,7 @@ static void __init reserve_ebda_region(void)
unsigned int addr;
addr = get_bios_ebda();
if (addr)
reserve_bootmem(addr, PAGE_SIZE);
reserve_bootmem(addr, PAGE_SIZE, BOOTMEM_DEFAULT);
}
#ifndef CONFIG_NEED_MULTIPLE_NODES
@ -484,7 +484,8 @@ static void __init reserve_crashkernel(void)
(unsigned long)(total_mem >> 20));
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
reserve_bootmem(crash_base, crash_size);
reserve_bootmem(crash_base, crash_size,
BOOTMEM_DEFAULT);
} else
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");
@ -525,7 +526,7 @@ static void __init reserve_initrd(void)
}
if (ramdisk_end <= end_of_lowmem) {
/* All in lowmem, easy case */
reserve_bootmem(ramdisk_image, ramdisk_size);
reserve_bootmem(ramdisk_image, ramdisk_size, BOOTMEM_DEFAULT);
initrd_start = ramdisk_image + PAGE_OFFSET;
initrd_end = initrd_start+ramdisk_size;
return;
@ -536,7 +537,7 @@ static void __init reserve_initrd(void)
/* Note: this includes all the lowmem currently occupied by
the initrd, we rely on that fact to keep the data intact. */
reserve_bootmem(ramdisk_here, ramdisk_size);
reserve_bootmem(ramdisk_here, ramdisk_size, BOOTMEM_DEFAULT);
initrd_start = ramdisk_here + PAGE_OFFSET;
initrd_end = initrd_start + ramdisk_size;
@ -606,13 +607,14 @@ void __init setup_bootmem_allocator(void)
* bootmem allocator with an invalid RAM area.
*/
reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text),
BOOTMEM_DEFAULT);
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
reserve_bootmem(0, PAGE_SIZE);
reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT);
/* reserve EBDA region, it's a 4K region */
reserve_ebda_region();
@ -622,7 +624,7 @@ void __init setup_bootmem_allocator(void)
unless you have no PS/2 mouse plugged in. */
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
boot_cpu_data.x86 == 6)
reserve_bootmem(0xa0000 - 4096, 4096);
reserve_bootmem(0xa0000 - 4096, 4096, BOOTMEM_DEFAULT);
#ifdef CONFIG_SMP
/*
@ -630,7 +632,7 @@ void __init setup_bootmem_allocator(void)
* FIXME: Don't need the extra page at 4K, but need to fix
* trampoline before removing it. (see the GDT stuff)
*/
reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
reserve_bootmem(PAGE_SIZE, PAGE_SIZE, BOOTMEM_DEFAULT);
#endif
#ifdef CONFIG_ACPI_SLEEP
/*

5
arch/x86/kernel/setup_64.c
View file

@ -189,7 +189,7 @@ contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
e820_register_active_regions(0, start_pfn, end_pfn);
free_bootmem_with_active_regions(0, end_pfn);
reserve_bootmem(bootmap, bootmap_size);
reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
}
#endif
@ -238,7 +238,8 @@ static void __init reserve_crashkernel(void)
(unsigned long)(free_mem >> 20));
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
reserve_bootmem(crash_base, crash_size);
reserve_bootmem(crash_base, crash_size,
BOOTMEM_DEFAULT);
} else
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");

3
arch/x86/mm/discontig_32.c
View file

@ -391,7 +391,8 @@ unsigned long __init setup_memory(void)
void __init numa_kva_reserve(void)
{
if (kva_pages)
reserve_bootmem(PFN_PHYS(kva_start_pfn), PFN_PHYS(kva_pages));
reserve_bootmem(PFN_PHYS(kva_start_pfn), PFN_PHYS(kva_pages),
BOOTMEM_DEFAULT);
}
void __init zone_sizes_init(void)

4
arch/x86/mm/init_64.c
View file

@ -644,9 +644,9 @@ void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
/* Should check here against the e820 map to avoid double free */
#ifdef CONFIG_NUMA
reserve_bootmem_node(NODE_DATA(nid), phys, len);
reserve_bootmem_node(NODE_DATA(nid), phys, len, BOOTMEM_DEFAULT);
#else
reserve_bootmem(phys, len);
reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
#endif
if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {
dma_reserve += len / PAGE_SIZE;

5
arch/x86/mm/numa_64.c
View file

@ -238,9 +238,10 @@ void __init setup_node_bootmem(int nodeid, unsigned long start,
free_bootmem_with_active_regions(nodeid, end);
reserve_bootmem_node(NODE_DATA(nodeid), nodedata_phys, pgdat_size);
reserve_bootmem_node(NODE_DATA(nodeid), nodedata_phys, pgdat_size,
BOOTMEM_DEFAULT);
reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start,
bootmap_pages<<PAGE_SHIFT);
bootmap_pages<<PAGE_SHIFT, BOOTMEM_DEFAULT);
#ifdef CONFIG_ACPI_NUMA
srat_reserve_add_area(nodeid);
#endif

3
arch/x86/mm/srat_64.c
View file

@ -488,7 +488,8 @@ void __init srat_reserve_add_area(int nodeid)
printk(KERN_INFO "SRAT: This will cost you %Lu MB of "
"pre-allocated memory.\n", (unsigned long long)total_mb);
reserve_bootmem_node(NODE_DATA(nodeid), nodes_add[nodeid].start,
nodes_add[nodeid].end - nodes_add[nodeid].start);
nodes_add[nodeid].end - nodes_add[nodeid].start,
BOOTMEM_DEFAULT);
}
}

4
include/asm-x86/mmzone_32.h
View file

@ -107,8 +107,8 @@ static inline int pfn_valid(int pfn)
/*
* Following are macros that are specific to this numa platform.
*/
#define reserve_bootmem(addr, size) \
reserve_bootmem_node(NODE_DATA(0), (addr), (size))
#define reserve_bootmem(addr, size, flags) \
reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
#define alloc_bootmem(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low(x) \

17
include/linux/bootmem.h
View file

@ -60,8 +60,20 @@ extern void *__alloc_bootmem_core(struct bootmem_data *bdata,
unsigned long goal,
unsigned long limit);
/*
* flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
* the architecture-specific code should honor this)
*/
#define BOOTMEM_DEFAULT 0
#define BOOTMEM_EXCLUSIVE (1<<0)
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
extern void reserve_bootmem(unsigned long addr, unsigned long size);
/*
* If flags is 0, then the return value is always 0 (success). If
* flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
* memory already was reserved.
*/
extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
#define alloc_bootmem(x) \
__alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low(x) \
@ -84,7 +96,8 @@ extern unsigned long init_bootmem_node(pg_data_t *pgdat,
unsigned long endpfn);
extern void reserve_bootmem_node(pg_data_t *pgdat,
unsigned long physaddr,
unsigned long size);
unsigned long size,
int flags);
extern void free_bootmem_node(pg_data_t *pgdat,
unsigned long addr,
unsigned long size);

27
mm/bootmem.c
View file

@ -111,11 +111,12 @@ static unsigned long __init init_bootmem_core(pg_data_t *pgdat,
* might be used for boot-time allocations - or it might get added
* to the free page pool later on.
*/
static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
unsigned long size)
static int __init reserve_bootmem_core(bootmem_data_t *bdata,
unsigned long addr, unsigned long size, int flags)
{
unsigned long sidx, eidx;
unsigned long i;
int ret;
/*
* round up, partially reserved pages are considered
@ -133,7 +134,20 @@ static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long add
#ifdef CONFIG_DEBUG_BOOTMEM
printk("hm, page %08lx reserved twice.\n", i*PAGE_SIZE);
#endif
if (flags & BOOTMEM_EXCLUSIVE) {
ret = -EBUSY;
goto err;
}
}
return 0;
err:
/* unreserve memory we accidentally reserved */
for (i--; i >= sidx; i--)
clear_bit(i, bdata->node_bootmem_map);
return ret;
}
static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
@ -374,9 +388,9 @@ unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
}
void __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
unsigned long size)
unsigned long size, int flags)
{
reserve_bootmem_core(pgdat->bdata, physaddr, size);
reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
}
void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
@ -398,9 +412,10 @@ unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
}
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
void __init reserve_bootmem(unsigned long addr, unsigned long size)
int __init reserve_bootmem(unsigned long addr, unsigned long size,
int flags)
{
reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size);
return reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size, flags);
}
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */