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ARM: Fix wrong shared bit for CPU write buffer bug test

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It is unpredictable to have the same memory mapped using different
shared bit settings for ARMv6 and ARMv7 CPUs.  Fix this for the CPU
write buffer bug test.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2009-12-23 19:54:31 +00:00
parent d9fd3ab89f
commit 52e8bfd81a
1 changed files with 2 additions and 3 deletions
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5
arch/arm/mm/fault-armv.c
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@ -207,9 +207,8 @@ void __init check_writebuffer_bugs(void)
page = alloc_page(GFP_KERNEL); page = alloc_page(GFP_KERNEL);
if (page) { if (page) {
unsigned long *p1, *p2; unsigned long *p1, *p2;
pgprot_t prot = __pgprot(L_PTE_PRESENT|L_PTE_YOUNG| pgprot_t prot = __pgprot_modify(PAGE_KERNEL,
L_PTE_DIRTY|L_PTE_WRITE| L_PTE_MT_MASK, L_PTE_MT_BUFFERABLE);
L_PTE_MT_BUFFERABLE);
p1 = vmap(&page, 1, VM_IOREMAP, prot); p1 = vmap(&page, 1, VM_IOREMAP, prot);
p2 = vmap(&page, 1, VM_IOREMAP, prot); p2 = vmap(&page, 1, VM_IOREMAP, prot);