[PATCH] handle SLOB with sparsemen

This is to disallow to make SLOB with SMP or SPARSEMEM.  This avoids latent
troubles of SLOB with SLAB_DESTROY_BY_RCU.  And fix compile error.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/init/Kconfig b/init/Kconfig
index 9b1adb1..a3f83e2 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -450,7 +450,7 @@ config SHMEM
 
 config SLAB
        default y
 
 config SLAB
        default y

-       bool "Use full SLAB allocator" if EMBEDDED
+       bool "Use full SLAB allocator" if (EMBEDDED && !SMP && !SPARSEMEM)

        help
          Disabling this replaces the advanced SLAB allocator and
          kmalloc support with the drastically simpler SLOB allocator.
        help
          Disabling this replaces the advanced SLAB allocator and
          kmalloc support with the drastically simpler SLOB allocator.