tree 7fa99fe8a333d567987e563dfa4ff1cf6ee03f04
parent d2ae2e525ec4e5d58153fb7ff0c6e5873769fa73
author Heiko Carstens <heiko.carstens@de.ibm.com> 1393762187 +0100
committer Thomas Gleixner <tglx@linutronix.de> 1393842728 +0100

futex: Allow architectures to skip futex_atomic_cmpxchg_inatomic() test

If an architecture has futex_atomic_cmpxchg_inatomic() implemented and there
is no runtime check necessary, allow to skip the test within futex_init().

This allows to get rid of some code which would always give the same result,
and also allows the compiler to optimize a couple of if statements away.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Finn Thain <fthain@telegraphics.com.au>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Link: http://lkml.kernel.org/r/20140302120947.GA3641@osiris
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>