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[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>
hifive-unleashed-5.1
Russell King 2008-10-27 11:24:09 +00:00 committed by Russell King
parent ed313489ba
commit 59f0cb0fdd
13 changed files with 16 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/boot/compressed/misc.c
View File

@ -86,6 +86,8 @@ static void putstr(const char *ptr)
#define __ptr_t void *
#define memzero(s,n) __memzero(s,n)
/*
* Optimised C version of memzero for the ARM.
*/

2
arch/arm/include/asm/page.h
View File

@ -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

2
arch/arm/include/asm/processor.h
View File

@ -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 \

9
arch/arm/include/asm/string.h
View File

@ -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

2
arch/arm/include/asm/uaccess.h
View File

@ -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;
}

2
arch/arm/lib/memset.S
View File

@ -25,7 +25,7 @@
add r2, r2, r3 @ 1 (r2 = r2 - (4 - r3))
/*
* The pointer is now aligned and the length is adjusted. Try doing the
* memzero again.
* memset again.
*/
ENTRY(memset)

2
arch/arm/mm/mmu.c
View File

@ -896,7 +896,7 @@ void __init paging_init(struct meminfo *mi, struct machine_desc *mdesc)
* allocate the zero page. Note that we count on this going ok.
*/
zero_page = alloc_bootmem_low_pages(PAGE_SIZE);
memzero(zero_page, PAGE_SIZE);
memset(zero_page, 0, PAGE_SIZE);
empty_zero_page = virt_to_page(zero_page);
flush_dcache_page(empty_zero_page);
}

2
arch/arm/mm/pgd.c
View File

@ -31,7 +31,7 @@ pgd_t *get_pgd_slow(struct mm_struct *mm)
if (!new_pgd)
goto no_pgd;
memzero(new_pgd, FIRST_KERNEL_PGD_NR * sizeof(pgd_t));
memset(new_pgd, 0, FIRST_KERNEL_PGD_NR * sizeof(pgd_t));
/*
* Copy over the kernel and IO PGD entries

6
drivers/mfd/asic3.c
View File

@ -474,9 +474,9 @@ static __init int asic3_gpio_probe(struct platform_device *pdev,
u16 dir_reg[ASIC3_NUM_GPIO_BANKS];
int i;
memzero(alt_reg, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
memzero(out_reg, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
memzero(dir_reg, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
/* Enable all GPIOs */
asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff);

2
drivers/mtd/maps/ixp2000.c
View File

@ -170,7 +170,7 @@ static int ixp2000_flash_probe(struct platform_device *dev)
err = -ENOMEM;
goto Error;
}
memzero(info, sizeof(struct ixp2000_flash_info));
memset(info, 0, sizeof(struct ixp2000_flash_info));
platform_set_drvdata(dev, info);

2
drivers/mtd/maps/ixp4xx.c
View File

@ -201,7 +201,7 @@ static int ixp4xx_flash_probe(struct platform_device *dev)
err = -ENOMEM;
goto Error;
}
memzero(info, sizeof(struct ixp4xx_flash_info));
memset(info, 0, sizeof(struct ixp4xx_flash_info));
platform_set_drvdata(dev, info);

4
drivers/mtd/nand/s3c2410.c
View File

@ -818,7 +818,7 @@ static int s3c24xx_nand_probe(struct platform_device *pdev,
goto exit_error;
}
memzero(info, sizeof(*info));
memset(info, 0, sizeof(*info));
platform_set_drvdata(pdev, info);
spin_lock_init(&info->controller.lock);
@ -883,7 +883,7 @@ static int s3c24xx_nand_probe(struct platform_device *pdev,
goto exit_error;
}
memzero(info->mtds, size);
memset(info->mtds, 0, size);
/* initialise all possible chips */

2
drivers/video/sa1100fb.c
View File

@ -114,7 +114,7 @@
* - convert dma address types to dma_addr_t
* - remove unused 'montype' stuff
* - remove redundant zero inits of init_var after the initial
* memzero.
* memset.
* - remove allow_modeset (acornfb idea does not belong here)
*
* 2001/05/28: <rmk@arm.linux.org.uk>