kernel.git/include/asm-generic/mutex-null.h, branch linux-2.6.17.yHosts the 0x221E linux distro kernel.
https://git.0xinfinity.dev/distro/kernel.git/atom?h=linux-2.6.17.y2006-01-09T23:59:17Z[PATCH] mutex subsystem, add asm-generic/mutex-[dec|xchg|null].h implementations2006-01-09T23:59:17ZIngo Molnar2006-01-09T23:59:17Zurn:sha1:620a6fd185c084aa617c411f711533f01ea673c9
Add three (generic) mutex fastpath implementations.
The mutex-xchg.h implementation is atomic_xchg() based, and should
work fine on every architecture.
The mutex-dec.h implementation is atomic_dec_return() based - this
one too should work on every architecture, but might not perform the
most optimally on architectures that have no atomic-dec/inc instructions.
The mutex-null.h implementation forces all calls into the slowpath. This
is used for mutex debugging, but it can also be used on platforms that do
not want (or need) a fastpath at all.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@infradead.org>