Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a22fb7ff1259e6ee87d0ba3559c9f7b7d0cb20d2 Commit: a22fb7ff1259e6ee87d0ba3559c9f7b7d0cb20d2 Parent: 03513bccad33667ed738cfd96dc5757e539e0bdb Author: Martin Schwidefsky <[EMAIL PROTECTED]> AuthorDate: Tue Feb 19 15:29:28 2008 +0100 Committer: Martin Schwidefsky <[EMAIL PROTECTED]> CommitDate: Tue Feb 19 15:29:33 2008 +0100
[S390] find bit corner case. Fix [ext2_]find_first_[zero_]bit for the corner case of an all clear or all set bit field by always handling that last word of the bit field with __ffz_word/__ffs_word. Signed-off-by: Martin Schwidefsky <[EMAIL PROTECTED]> --- include/asm-s390/bitops.h | 20 ++++++++++++-------- 1 files changed, 12 insertions(+), 8 deletions(-) diff --git a/include/asm-s390/bitops.h b/include/asm-s390/bitops.h index ab83c84..965394e 100644 --- a/include/asm-s390/bitops.h +++ b/include/asm-s390/bitops.h @@ -456,16 +456,18 @@ static inline unsigned long __ffz_word_loop(const unsigned long *addr, asm volatile( #ifndef __s390x__ - " ahi %1,31\n" - " srl %1,5\n" + " ahi %1,-1\n" + " sra %1,5\n" + " jz 1f\n" "0: c %2,0(%0,%3)\n" " jne 1f\n" " la %0,4(%0)\n" " brct %1,0b\n" "1:\n" #else - " aghi %1,63\n" - " srlg %1,%1,6\n" + " aghi %1,-1\n" + " srag %1,%1,6\n" + " jz 1f\n" "0: cg %2,0(%0,%3)\n" " jne 1f\n" " la %0,8(%0)\n" @@ -491,16 +493,18 @@ static inline unsigned long __ffs_word_loop(const unsigned long *addr, asm volatile( #ifndef __s390x__ - " ahi %1,31\n" - " srl %1,5\n" + " ahi %1,-1\n" + " sra %1,5\n" + " jz 1f\n" "0: c %2,0(%0,%3)\n" " jne 1f\n" " la %0,4(%0)\n" " brct %1,0b\n" "1:\n" #else - " aghi %1,63\n" - " srlg %1,%1,6\n" + " aghi %1,-1\n" + " srag %1,%1,6\n" + " jz 1f\n" "0: cg %2,0(%0,%3)\n" " jne 1f\n" " la %0,8(%0)\n" - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html