You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

Andi Kleen a586df067a x86: Support __attribute__((__cold__)) in gcc 4.3 ... gcc 4.3 supports a new __attribute__((__cold__)) to mark functions cold. Any path directly leading to a call of this function will be unlikely. And gcc will try to generate smaller code for the function itself. Please use with care. The code generation advantage isn't large and in most cases it is not worth uglifying code with this. This patch marks some common error functions like panic(), printk() as cold. This will longer term make many unlikely()s unnecessary, although we can keep them for now for older compilers. BUG is not marked cold because there is currently no way to tell gcc to mark a inline function told. Also all __init and __exit functions are marked cold. With a non -Os build this will tell the compiler to generate slightly smaller code for them. I think it currently only uses less alignments for labels, but that might change in the future. One disadvantage over *likely() is that they cannot be easily instrumented to verify them. Another drawback is that only the latest gcc 4.3 snapshots support this. Unfortunately we cannot detect this using the preprocessor. This means older snapshots will fail now. I don't think that's a problem because they are unreleased compilers that nobody should be using. gcc also has a __hot__ attribute, but I don't see any sense in using this in the kernel right now. But someday I hope gcc will be able to use more aggressive optimizing for hot functions even in -Os, if that happens it should be added. Includes compile fix from Thomas Gleixner. Cc: Jan Hubicka <jh@suse.cz> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		18 years ago
..
acpi	…
asm-alpha	[PATCH] sched: sched_cacheflush is now unused	18 years ago
asm-arm	[PATCH] sched: sched_cacheflush is now unused	18 years ago
asm-arm26	[PATCH] sched: sched_cacheflush is now unused	18 years ago
asm-avr32	…
asm-blackfin	…
asm-cris	…
asm-frv	…
asm-generic	i386: Put allocated ELF notes in read-only data segment	18 years ago
asm-h8300	arch: personality independent stack top	18 years ago
asm-i386	…
asm-ia64	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6	18 years ago
asm-m32r	…
asm-m68k	m68k iomem (based on Geert's tree + memcpy_... stuff)	18 years ago
asm-m68knommu	…
asm-mips	…
asm-parisc	…
asm-powerpc	…
asm-ppc	…
asm-s390	…
asm-sh	…
asm-sh64	…
asm-sparc	…
asm-sparc64	[SPARC64]: Convert parport to of_platform_driver.	18 years ago
asm-um	arch: personality independent stack top	18 years ago
asm-v850	fbdev: detect primary display device	18 years ago
asm-x86_64	x86_64: Always use builtin memcpy on gcc 4.3	18 years ago
asm-xtensa	…
crypto	[CRYPTO] cryptd: Add software async crypto daemon	18 years ago
keys	…
linux	x86: Support __attribute__((__cold__)) in gcc 4.3	18 years ago
math-emu	…
media	V4L/DVB (5835): saa7146/dvb-ttpci: Fix signedness warnings (gcc 4.1.1, kernel 2.6.22)	18 years ago
mtd	…
net	…
pcmcia	…
rdma	…
rxrpc	…
scsi	…
sound	…
video	…
xen	…
Kbuild	…