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authorJens Axboe <jens.axboe@oracle.com>2008-06-26 11:21:34 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-06-26 11:21:34 +0200
commit3d4422332711ef48ef0f132f1fcbfcbd56c7f3d1 (patch)
tree9fd3cfa9825e8cb0b7e08dfae85cc9a722442849 /arch/Kconfig
parent543cf4cb3fe6f6cae3651ba918b9c56200b257d0 (diff)
downloadlwn-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/Kconfig3
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