[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 <[e-mail]>

arch/arm/boot/compressed/misc.c

···
 
 #define __ptr_t void *
 
+#define memzero(s,n) __memzero(s,n)
+
 /*
  * Optimised C version of memzero for the ARM.
  */

arch/arm/include/asm/page.h

···
 #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

arch/arm/include/asm/processor.h

···
 ({									\
 	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								\

arch/arm/include/asm/string.h

···
 #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);
 
···
 		}							\
 		(__p);							\
 	})
-
-#define memzero(p,n) 							\
-	({ 								\
-	 	void *__p = (p); size_t __n = n;			\
-	 	if ((__n) != 0) 					\
-	 		__memzero((__p),(__n)); 			\
-	 	(__p); 							\
-	 })
 
 #endif

arch/arm/include/asm/uaccess.h

···
 	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;
 }
 

arch/arm/lib/memset.S

···
 	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)

arch/arm/mm/mmu.c

···
 	 * 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);
 }

arch/arm/mm/pgd.c

···
 	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

drivers/mfd/asic3.c

···
 	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);

drivers/mtd/maps/ixp2000.c

···
 		err = -ENOMEM;
 		goto Error;
 	}
-	memzero(info, sizeof(struct ixp2000_flash_info));
+	memset(info, 0, sizeof(struct ixp2000_flash_info));
 
 	platform_set_drvdata(dev, info);
 

drivers/mtd/maps/ixp4xx.c

···
 		err = -ENOMEM;
 		goto Error;
 	}
-	memzero(info, sizeof(struct ixp4xx_flash_info));
+	memset(info, 0, sizeof(struct ixp4xx_flash_info));
 
 	platform_set_drvdata(dev, info);
 

drivers/mtd/nand/s3c2410.c

···
 		goto exit_error;
 	}
 
-	memzero(info, sizeof(*info));
+	memset(info, 0, sizeof(*info));
 	platform_set_drvdata(pdev, info);
 
 	spin_lock_init(&info->controller.lock);
···
 		goto exit_error;
 	}
 
-	memzero(info->mtds, size);
+	memset(info->mtds, 0, size);
 
 	/* initialise all possible chips */
 

drivers/video/sa1100fb.c

···
  *	- 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: <[e-mail]>