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| author | Jens Axboe <jens.axboe@oracle.com> | 2008-06-26 11:21:34 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-06-26 11:21:34 +0200 |
| commit | 3d4422332711ef48ef0f132f1fcbfcbd56c7f3d1 (patch) | |
| tree | 9fd3cfa9825e8cb0b7e08dfae85cc9a722442849 /arch/Kconfig | |
| parent | 543cf4cb3fe6f6cae3651ba918b9c56200b257d0 (diff) | |
| download | lwn-3d4422332711ef48ef0f132f1fcbfcbd56c7f3d1.tar.gz lwn-3d4422332711ef48ef0f132f1fcbfcbd56c7f3d1.zip | |
Add generic helpers for arch IPI function calls
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" <Alan.Brunelle@hp.com> has
contributed lots of fixes and suggestions as well. Also thanks to
Paul E. McKenney <paulmck@linux.vnet.ibm.com> for reviewing RCU usage
and getting rid of the data allocation fallback deadlock.
Acked-by: Ingo Molnar <mingo@elte.hu>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 3ea332b009e5..ad89a33d8c6e 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -39,3 +39,6 @@ config HAVE_KRETPROBES config HAVE_DMA_ATTRS def_bool n + +config USE_GENERIC_SMP_HELPERS + def_bool n |