Blackfin arch: fix bug - gdb signull case make trunk kernel panic frequently
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>
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@ -45,6 +45,7 @@
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#include <asm/asm-offsets.h>
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#include <asm/dma.h>
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#include <asm/fixed_code.h>
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#include <asm/cacheflush.h>
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#include <asm/mem_map.h>
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#define TEXT_OFFSET 0
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@ -240,7 +241,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
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} else if (addr >= FIXED_CODE_START
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&& addr + sizeof(tmp) <= FIXED_CODE_END) {
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memcpy(&tmp, (const void *)(addr), sizeof(tmp));
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copy_from_user_page(0, 0, 0, &tmp, (const void *)(addr), sizeof(tmp));
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copied = sizeof(tmp);
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} else
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@ -320,7 +321,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
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} else if (addr >= FIXED_CODE_START
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&& addr + sizeof(data) <= FIXED_CODE_END) {
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memcpy((void *)(addr), &data, sizeof(data));
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copy_to_user_page(0, 0, 0, (void *)(addr), &data, sizeof(data));
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copied = sizeof(data);
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} else
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