Commit bdfeb0cc authored by Guo Ren's avatar Guo Ren
Browse files

csky: Fixup abiv1 memset error 



Current memset implementation in abiv1 is wrong and it'll cause unalign
access. Just remove it and use the generic one. This patch will cause
performance degradation and we will improve it with a new design in next
patchset.

Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
parent 4e562c11

arch/csky/abiv1/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -5,5 +5,4 @@ obj-y += bswapsi.o 
obj-y					+= cacheflush.o

obj-y					+= mmap.o

obj-y					+= memcpy.o

obj-y					+= memset.o

obj-y					+= strksyms.o

arch/csky/abiv1/inc/abi/string.h

+0 −3
Original line number Diff line number Diff line
@@ -7,7 +7,4 @@ 
#define __HAVE_ARCH_MEMCPY

extern void *memcpy(void *, const void *, __kernel_size_t);



#define __HAVE_ARCH_MEMSET

extern void *memset(void *, int, __kernel_size_t);



#endif /* __ABI_CSKY_STRING_H */

arch/csky/abiv1/memset.c

deleted100644 → 0
+0 −37
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.



#include <linux/types.h>



void *memset(void *dest, int c, size_t l)

{

	char *d = dest;

	int ch = c & 0xff;

	int tmp = (ch | ch << 8 | ch << 16 | ch << 24);



	while (((uintptr_t)d & 0x3) && l--)

		*d++ = ch;



	while (l >= 16) {

		*(((u32 *)d))   = tmp;

		*(((u32 *)d)+1) = tmp;

		*(((u32 *)d)+2) = tmp;

		*(((u32 *)d)+3) = tmp;

		l -= 16;

		d += 16;

	}



	while (l > 3) {

		*(((u32 *)d)) = tmp;

		l -= 4;

		d += 4;

	}



	while (l) {

		*d = ch;

		l--;

		d++;

	}



	return dest;

}

arch/csky/abiv1/strksyms.c

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Original line number Diff line number Diff line
@@ -4,4 +4,3 @@ 
#include <linux/module.h>



EXPORT_SYMBOL(memcpy);
 
EXPORT_SYMBOL(memset);

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