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| author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
| commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
| tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/sparc/lib/GENcopy_to_user.S | |
| parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
| parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
| download | FOSSEE-netbook-kernel-source-97327692361306d1e6259021bc425e32832fdb50.tar.gz FOSSEE-netbook-kernel-source-97327692361306d1e6259021bc425e32832fdb50.tar.bz2 FOSSEE-netbook-kernel-source-97327692361306d1e6259021bc425e32832fdb50.zip | |
dirty fix to merging
Diffstat (limited to 'arch/sparc/lib/GENcopy_to_user.S')
| -rw-r--r-- | arch/sparc/lib/GENcopy_to_user.S | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/sparc/lib/GENcopy_to_user.S b/arch/sparc/lib/GENcopy_to_user.S new file mode 100644 index 00000000..780550e1 --- /dev/null +++ b/arch/sparc/lib/GENcopy_to_user.S @@ -0,0 +1,34 @@ +/* GENcopy_to_user.S: Generic sparc64 copy to userspace. + * + * Copyright (C) 2007 David S. Miller (davem@davemloft.net) + */ + +#define EX_ST(x) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, __retl_one; \ + .text; \ + .align 4; + +#ifndef ASI_AIUS +#define ASI_AIUS 0x11 +#endif + +#define FUNC_NAME GENcopy_to_user +#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS +#define EX_RETVAL(x) 0 + +#ifdef __KERNEL__ + /* Writing to %asi is _expensive_ so we hardcode it. + * Reading %asi to check for KERNEL_DS is comparatively + * cheap. + */ +#define PREAMBLE \ + rd %asi, %g1; \ + cmp %g1, ASI_AIUS; \ + bne,pn %icc, ___copy_in_user; \ + nop +#endif + +#include "GENmemcpy.S" |