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cd354f1ae7
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
144 lines
2.7 KiB
C
144 lines
2.7 KiB
C
/*
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* pci_syscall.c
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*
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* For architectures where we want to allow direct access
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* to the PCI config stuff - it would probably be preferable
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* on PCs too, but there people just do it by hand with the
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* magic northbridge registers..
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*/
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#include <linux/errno.h>
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#include <linux/pci.h>
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#include <linux/smp_lock.h>
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#include <linux/syscalls.h>
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#include <asm/uaccess.h>
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#include "pci.h"
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asmlinkage long
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sys_pciconfig_read(unsigned long bus, unsigned long dfn,
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unsigned long off, unsigned long len,
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void __user *buf)
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{
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struct pci_dev *dev;
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u8 byte;
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u16 word;
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u32 dword;
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long err, cfg_ret;
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err = -EPERM;
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if (!capable(CAP_SYS_ADMIN))
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goto error;
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err = -ENODEV;
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dev = pci_find_slot(bus, dfn);
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if (!dev)
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goto error;
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lock_kernel();
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switch (len) {
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case 1:
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cfg_ret = pci_user_read_config_byte(dev, off, &byte);
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break;
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case 2:
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cfg_ret = pci_user_read_config_word(dev, off, &word);
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break;
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case 4:
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cfg_ret = pci_user_read_config_dword(dev, off, &dword);
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break;
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default:
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err = -EINVAL;
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unlock_kernel();
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goto error;
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};
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unlock_kernel();
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err = -EIO;
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if (cfg_ret != PCIBIOS_SUCCESSFUL)
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goto error;
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switch (len) {
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case 1:
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err = put_user(byte, (unsigned char __user *)buf);
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break;
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case 2:
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err = put_user(word, (unsigned short __user *)buf);
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break;
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case 4:
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err = put_user(dword, (unsigned int __user *)buf);
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break;
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};
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return err;
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error:
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/* ??? XFree86 doesn't even check the return value. They
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just look for 0xffffffff in the output, since that's what
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they get instead of a machine check on x86. */
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switch (len) {
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case 1:
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put_user(-1, (unsigned char __user *)buf);
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break;
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case 2:
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put_user(-1, (unsigned short __user *)buf);
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break;
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case 4:
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put_user(-1, (unsigned int __user *)buf);
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break;
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};
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return err;
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}
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asmlinkage long
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sys_pciconfig_write(unsigned long bus, unsigned long dfn,
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unsigned long off, unsigned long len,
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void __user *buf)
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{
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struct pci_dev *dev;
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u8 byte;
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u16 word;
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u32 dword;
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int err = 0;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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dev = pci_find_slot(bus, dfn);
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if (!dev)
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return -ENODEV;
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lock_kernel();
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switch(len) {
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case 1:
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err = get_user(byte, (u8 __user *)buf);
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if (err)
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break;
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err = pci_user_write_config_byte(dev, off, byte);
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if (err != PCIBIOS_SUCCESSFUL)
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err = -EIO;
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break;
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case 2:
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err = get_user(word, (u16 __user *)buf);
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if (err)
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break;
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err = pci_user_write_config_word(dev, off, word);
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if (err != PCIBIOS_SUCCESSFUL)
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err = -EIO;
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break;
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case 4:
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err = get_user(dword, (u32 __user *)buf);
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if (err)
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break;
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err = pci_user_write_config_dword(dev, off, dword);
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if (err != PCIBIOS_SUCCESSFUL)
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err = -EIO;
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break;
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default:
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err = -EINVAL;
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break;
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};
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unlock_kernel();
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return err;
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}
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