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authorGrant Grundler <grundler@parisc-linux.org>2005-10-21 22:45:22 -0400
committerKyle McMartin <kyle@parisc-linux.org>2005-10-21 22:45:22 -0400
commita366064c3ff46c985a3c7243468be197d29874dc (patch)
tree379418f6bbbfcfb8ebd6a53786e8d5e0a19d0327 /include/asm-parisc/processor.h
parent2464212f68136527f6364d63c23a529e1fd7d168 (diff)
[PARISC] Update bitops from parisc tree
Optimize ext2_find_next_zero_bit. Gives about 25% perf improvement with a rsync test with ext3. Signed-off-by: Randolph Chung <tausq@parisc-linux.org> fix ext3 performance - ext2_find_next_zero() was culprit. Kudos to jejb for pointing out the the possibility that ext2_test_bit and ext2_find_next_zero() may in fact not be enumerating bits in the bitmap because of endianess. Took sparc64 implementation and adapted it to our tree. I suspect the real problem is ffz() wants an unsigned long and was getting garbage in the top half of the unsigned int. Not confirmed but that's what I suspect. Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Fix find_next_bit for 32-bit Make masking consistent for bitops From: Joel Soete <soete.joel@tiscali.be> Signed-off-by: Randolph Chung <tausq@parisc-linux.org> Add back incorrectly removed ext2_find_first_zero_bit definition Signed-off-by: James Bottomley <jejb@parisc-linux.org> Fixup bitops.h to use volatile for *_bit() ops Based on this email thread: http://marc.theaimsgroup.com/?t=108826637900003 In a nutshell: *_bit() want use of volatile. __*_bit() are "relaxed" and don't use spinlock or volatile. other minor changes: o replaces hweight64() macro with alias to generic_hweight64() (Joel Soete) o cleanup ext2* macros so (a) it's obvious what the XOR magic is about and (b) one version that works for both 32/64-bit. o replace 2 uses of CONFIG_64BIT with __LP64__. bitops.h used both. I think header files that might go to user space should use something userspace will know about (__LP64__). Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Move SHIFT_PER_LONG to standard location for BITS_PER_LONG (asm/types.h) and ditch the second definition of BITS_PER_LONG in bitops.h Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'include/asm-parisc/processor.h')
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