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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-10-27 14:24:09 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-11-27 15:37:59 +0300 |
| commit | 59f0cb0fddc14ffc6676ae62e911f8115ebc8ccf (patch) | |
| tree | 1e5fc347287c02e83dce967180c96906f6ed7455 /arch/arm/include | |
| parent | ed313489badef16d700f5a3be50e8fd8f8294bc8 (diff) | |
| download | linux-59f0cb0fddc14ffc6676ae62e911f8115ebc8ccf.tar.xz | |
[ARM] remove memzero()
As suggested by Andrew Morton, remove memzero() - it's not supported
on other architectures so use of it is a potential build breaking bug.
Since the compiler optimizes memset(x,0,n) to __memzero() perfectly
well, we don't miss out on the underlying benefits of memzero().
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/page.h | 2 | ||||
| -rw-r--r-- | arch/arm/include/asm/processor.h | 2 | ||||
| -rw-r--r-- | arch/arm/include/asm/string.h | 9 | ||||
| -rw-r--r-- | arch/arm/include/asm/uaccess.h | 2 |
4 files changed, 3 insertions, 12 deletions
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h index bed1c0a00368..5fee45e23038 100644 --- a/arch/arm/include/asm/page.h +++ b/arch/arm/include/asm/page.h @@ -133,7 +133,7 @@ extern void __cpu_copy_user_page(void *to, const void *from, #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) -#define clear_page(page) memzero((void *)(page), PAGE_SIZE) +#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) extern void copy_page(void *to, const void *from); #undef STRICT_MM_TYPECHECKS diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h index 517a4d6ffc74..2320508443a5 100644 --- a/arch/arm/include/asm/processor.h +++ b/arch/arm/include/asm/processor.h @@ -64,7 +64,7 @@ struct thread_struct { ({ \ unsigned long *stack = (unsigned long *)sp; \ set_fs(USER_DS); \ - memzero(regs->uregs, sizeof(regs->uregs)); \ + memset(regs->uregs, 0, sizeof(regs->uregs)); \ if (current->personality & ADDR_LIMIT_32BIT) \ regs->ARM_cpsr = USR_MODE; \ else \ diff --git a/arch/arm/include/asm/string.h b/arch/arm/include/asm/string.h index e50c4a39b699..cf4f3aad0fc1 100644 --- a/arch/arm/include/asm/string.h +++ b/arch/arm/include/asm/string.h @@ -21,7 +21,6 @@ extern void * memmove(void *, const void *, __kernel_size_t); #define __HAVE_ARCH_MEMCHR extern void * memchr(const void *, int, __kernel_size_t); -#define __HAVE_ARCH_MEMZERO #define __HAVE_ARCH_MEMSET extern void * memset(void *, int, __kernel_size_t); @@ -39,12 +38,4 @@ extern void __memzero(void *ptr, __kernel_size_t n); (__p); \ }) -#define memzero(p,n) \ - ({ \ - void *__p = (p); size_t __n = n; \ - if ((__n) != 0) \ - __memzero((__p),(__n)); \ - (__p); \ - }) - #endif diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h index e98ec60b3400..cbb7a37e2978 100644 --- a/arch/arm/include/asm/uaccess.h +++ b/arch/arm/include/asm/uaccess.h @@ -400,7 +400,7 @@ static inline unsigned long __must_check copy_from_user(void *to, const void __u if (access_ok(VERIFY_READ, from, n)) n = __copy_from_user(to, from, n); else /* security hole - plug it */ - memzero(to, n); + memset(to, 0, n); return n; } |