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Blackfin arch: fix bug - gdb signull case make trunk kernel panic frequently

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Use copy_to_user_page and copy_from_user_page instead of
memcpy. copy_to_user_page does cache flush when necessary.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Jie Zhang 2009-03-05 18:50:26 +08:00 committed by Bryan Wu
parent 27276ba21f
commit 7786ce823b
1 changed files with 3 additions and 2 deletions
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5
arch/blackfin/kernel/ptrace.c
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@ -45,6 +45,7 @@
#include <asm/asm-offsets.h>
#include <asm/dma.h>
#include <asm/fixed_code.h>
#include <asm/cacheflush.h>
#include <asm/mem_map.h>
#define TEXT_OFFSET 0
@ -240,7 +241,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
} else if (addr >= FIXED_CODE_START
&& addr + sizeof(tmp) <= FIXED_CODE_END) {
memcpy(&tmp, (const void *)(addr), sizeof(tmp));
copy_from_user_page(0, 0, 0, &tmp, (const void *)(addr), sizeof(tmp));
copied = sizeof(tmp);
} else
@ -320,7 +321,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
} else if (addr >= FIXED_CODE_START
&& addr + sizeof(data) <= FIXED_CODE_END) {
memcpy((void *)(addr), &data, sizeof(data));
copy_to_user_page(0, 0, 0, (void *)(addr), &data, sizeof(data));
copied = sizeof(data);
} else