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authorNick Piggin <npiggin@suse.de>2008-07-30 15:23:13 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-30 15:26:54 +1000
commitce0ad7f0952581ba75ab6aee55bb1ed9bb22cf4f (patch)
treebf2a8845a031cb685219db2ddcb3d296b4a9ffab /arch/powerpc/Kconfig
parent7d2a175b9bf6e9422bebe95130a3c79a25ff4602 (diff)
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powerpc/mm: Lockless get_user_pages_fast() for 64-bit (v3)
Implement lockless get_user_pages_fast for 64-bit powerpc. Page table existence is guaranteed with RCU, and speculative page references are used to take a reference to the pages without having a prior existence guarantee on them. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/Kconfig')
-rw-r--r--arch/powerpc/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 587da5e..63c9caf 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -42,6 +42,9 @@ config GENERIC_HARDIRQS
bool
default y
+config HAVE_GET_USER_PAGES_FAST
+ def_bool PPC64
+
config HAVE_SETUP_PER_CPU_AREA
def_bool PPC64