diff options
| author | Nick Piggin <npiggin@suse.de> | 2008-07-30 01:23:13 -0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-30 01:26:54 -0400 |
| commit | ce0ad7f0952581ba75ab6aee55bb1ed9bb22cf4f (patch) | |
| tree | bf2a8845a031cb685219db2ddcb3d296b4a9ffab /arch/powerpc/Kconfig | |
| parent | 7d2a175b9bf6e9422bebe95130a3c79a25ff4602 (diff) | |
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/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 587da5e0990f..63c9cafda9c4 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig | |||
| @@ -42,6 +42,9 @@ config GENERIC_HARDIRQS | |||
| 42 | bool | 42 | bool |
| 43 | default y | 43 | default y |
| 44 | 44 | ||
| 45 | config HAVE_GET_USER_PAGES_FAST | ||
| 46 | def_bool PPC64 | ||
| 47 | |||
| 45 | config HAVE_SETUP_PER_CPU_AREA | 48 | config HAVE_SETUP_PER_CPU_AREA |
| 46 | def_bool PPC64 | 49 | def_bool PPC64 |
| 47 | 50 | ||