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| author |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-12-09 17:14:38 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-12-09 17:14:38 +1100 |
| commit | bcd6acd51f3d4d1ada201e9bc5c40a31d6d80c71 (patch) | |
| tree | 2f6dffd2d3e4dd67355a224de7e7a960335a92fd /arch/mips/include/asm/system.h | |
| parent | MAINTAINERS: Add PowerPC patterns (diff) | |
| parent | Merge branch 'x86-xen-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip (diff) | |
| download | wireguard-linux-bcd6acd51f3d4d1ada201e9bc5c40a31d6d80c71.tar.xz wireguard-linux-bcd6acd51f3d4d1ada201e9bc5c40a31d6d80c71.zip | |
Merge commit 'origin/master' into next
Conflicts:
include/linux/kvm.h
Diffstat (limited to 'arch/mips/include/asm/system.h')
| -rw-r--r-- | arch/mips/include/asm/system.h | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h index fcf5f98d90cc..83b5509e09e8 100644 --- a/arch/mips/include/asm/system.h +++ b/arch/mips/include/asm/system.h @@ -12,6 +12,7 @@ #ifndef _ASM_SYSTEM_H #define _ASM_SYSTEM_H +#include <linux/kernel.h> #include <linux/types.h> #include <linux/irqflags.h> @@ -193,10 +194,6 @@ extern __u64 __xchg_u64_unsupported_on_32bit_kernels(volatile __u64 * m, __u64 v #define __xchg_u64 __xchg_u64_unsupported_on_32bit_kernels #endif -/* This function doesn't exist, so you'll get a linker error - if something tries to do an invalid xchg(). */ -extern void __xchg_called_with_bad_pointer(void); - static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size) { switch (size) { @@ -205,11 +202,17 @@ static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int siz case 8: return __xchg_u64(ptr, x); } - __xchg_called_with_bad_pointer(); + return x; } -#define xchg(ptr, x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) +#define xchg(ptr, x) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) & ~0xc); \ + \ + ((__typeof__(*(ptr))) \ + __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))); \ +}) extern void set_handler(unsigned long offset, void *addr, unsigned long len); extern void set_uncached_handler(unsigned long offset, void *addr, unsigned long len); |