A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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Add generic helpers for arch IPI function calls

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This adds kernel/smp.c which contains helpers for IPI function calls. In
addition to supporting the existing smp_call_function() in a more efficient
manner, it also adds a more scalable variant called smp_call_function_single()
for calling a given function on a single CPU only.

The core of this is based on the x86-64 patch from Nick Piggin, lots of
changes since then. "Alan D. Brunelle" <[email protected]> has
contributed lots of fixes and suggestions as well. Also thanks to
Paul E. McKenney <[email protected]> for reviewing RCU usage
and getting rid of the data allocation fallback deadlock.

Acked-by: Ingo Molnar <[email protected]>
Reviewed-by: Paul E. McKenney <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2008-06-26 11:21:34 +02:00
commit 3d44223327
6 changed files with 428 additions and 7 deletions
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3
arch/Kconfig
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@ -39,3 +39,6 @@ config HAVE_KRETPROBES
config HAVE_DMA_ATTRS
def_bool n
config USE_GENERIC_SMP_HELPERS
def_bool n