a366064c3f
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>
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
#ifndef _PARISC_TYPES_H
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#define _PARISC_TYPES_H
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#ifndef __ASSEMBLY__
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typedef unsigned short umode_t;
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/*
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* __xx is ok: it doesn't pollute the POSIX namespace. Use these in the
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* header files exported to user space
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*/
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typedef __signed__ char __s8;
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typedef unsigned char __u8;
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typedef __signed__ short __s16;
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typedef unsigned short __u16;
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typedef __signed__ int __s32;
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typedef unsigned int __u32;
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#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
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typedef __signed__ long long __s64;
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typedef unsigned long long __u64;
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#endif
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#endif /* __ASSEMBLY__ */
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/*
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* These aren't exported outside the kernel to avoid name space clashes
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*/
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#ifdef __KERNEL__
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#ifdef __LP64__
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#define BITS_PER_LONG 64
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#define SHIFT_PER_LONG 6
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#else
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#define BITS_PER_LONG 32
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#define SHIFT_PER_LONG 5
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#endif
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#ifndef __ASSEMBLY__
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typedef signed char s8;
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typedef unsigned char u8;
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typedef signed short s16;
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typedef unsigned short u16;
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typedef signed int s32;
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typedef unsigned int u32;
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typedef signed long long s64;
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typedef unsigned long long u64;
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/* Dma addresses are 32-bits wide. */
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typedef u32 dma_addr_t;
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typedef u64 dma64_addr_t;
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif
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