[S390] Cleanup & optimize bitops.

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The bitops header is now a bit shorter and easier to understand since
it uses less inline assembly. It requires some tricks to persuade the
compiler to generate decent code. The ffz/ffs functions now use the
_zb_findmap/_sb_findmap table as well.
With this cleanup the new bitops for ext4 can be implemented with a
few lines, instead of another large inline assembly.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Martin Schwidefsky 2008-02-05 16:50:43 +01:00

parent b6b40c532a

commit 0abbf05cdd

1 changed files with 219 additions and 296 deletions

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include/asm-s390/bitops.h

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