Christoph Lameter 6d7779538f mm: optimize compound_head() by avoiding a shared page flag ...

The patch adds PageTail(page) and PageHead(page) to check if a page is the
head or the tail of a compound page.  This is done by masking the two bits
describing the state of a compound page and then comparing them.  So one
comparision and a branch instead of two bit checks and two branches.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2007-05-07 12:12:53 -07:00

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acpi

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asm-alpha

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-arm

Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm

2007-05-06 13:20:10 -07:00

asm-arm26

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asm-avr32

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-cris

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asm-frv

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-generic

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asm-h8300

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-i386

i386: use page allocator to allocate thread_info structure

2007-05-07 12:12:53 -07:00

asm-ia64

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-m32r

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-m68k

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-m68knommu

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-mips

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-parisc

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-powerpc

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-ppc

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asm-s390

Introduce CONFIG_HAS_DMA

2007-05-07 12:12:51 -07:00

asm-sh

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-sh64

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-sparc

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asm-sparc64

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-um

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asm-v850

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

asm-x86_64

Revert "[PATCH] x86: __pa and __pa_symbol address space separation"

2007-05-07 08:44:24 -07:00

asm-xtensa

Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6

2007-05-05 14:55:20 -07:00

crypto

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keys

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linux

mm: optimize compound_head() by avoiding a shared page flag

2007-05-07 12:12:53 -07:00

math-emu

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media

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mtd

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net

[MAC80211]: Add mac80211 wireless stack.

2007-05-05 11:45:53 -07:00

pcmcia

add new_id to PCMCIA drivers

2007-05-07 12:12:50 -07:00

rdma

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rxrpc

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scsi

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sound

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video

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Kbuild

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