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| author | Michael Ellerman <mpe@ellerman.id.au> | 2014-09-25 16:45:11 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-09-30 14:59:12 +1000 |
| commit | fe2a1bb1dbff1bc7b8c24eb1f691a544488617fa (patch) | |
| tree | a224f729189b0cb116be365eb13235de8679be57 /arch/powerpc/include | |
| parent | de5946c03575fb8c222610a6ac6726a5deabad46 (diff) | |
| download | linux-fe2a1bb1dbff1bc7b8c24eb1f691a544488617fa.tar.gz linux-fe2a1bb1dbff1bc7b8c24eb1f691a544488617fa.tar.bz2 linux-fe2a1bb1dbff1bc7b8c24eb1f691a544488617fa.zip | |
selftests/powerpc: Add test of load_unaligned_zero_pad()
It is a rarely exercised case, so we want to have a test to ensure it
works as required.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/word-at-a-time.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/word-at-a-time.h b/arch/powerpc/include/asm/word-at-a-time.h index 07cc121e8a79..ea52b51be401 100644 --- a/arch/powerpc/include/asm/word-at-a-time.h +++ b/arch/powerpc/include/asm/word-at-a-time.h @@ -116,6 +116,15 @@ static inline unsigned long prep_zero_mask(unsigned long a, unsigned long bits, #endif +/* + * We use load_unaligned_zero() in a selftest, which builds a userspace + * program. Some linker scripts seem to discard the .fixup section, so allow + * the test code to use a different section name. + */ +#ifndef FIXUP_SECTION +#define FIXUP_SECTION ".fixup" +#endif + static inline unsigned long load_unaligned_zeropad(const void *addr) { unsigned long ret, offset, tmp; @@ -123,7 +132,7 @@ static inline unsigned long load_unaligned_zeropad(const void *addr) asm( "1: " PPC_LL "%[ret], 0(%[addr])\n" "2:\n" - ".section .fixup,\"ax\"\n" + ".section " FIXUP_SECTION ",\"ax\"\n" "3: " #ifdef __powerpc64__ "clrrdi %[tmp], %[addr], 3\n\t" @@ -156,4 +165,6 @@ static inline unsigned long load_unaligned_zeropad(const void *addr) return ret; } +#undef FIXUP_SECTION + #endif /* _ASM_WORD_AT_A_TIME_H */ |