FRV: Specify the minimum slab/kmalloc alignment

Specify the minimum slab/kmalloc alignment to be 8 bytes.  This fixes a
crash when SLOB is selected as the memory allocator.  The FRV arch needs
this so that it can use the load- and store-double instructions without
faulting.  By default SLOB sets the minimum to be 4 bytes.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/asm-frv/mem-layout.h b/include/asm-frv/mem-layout.h
index 734a1d0583b6..8a15c90431b9 100644
--- a/include/asm-frv/mem-layout.h
+++ b/include/asm-frv/mem-layout.h
@@ -31,6 +31,13 @@
 
 #define PAGE_MASK                       (~(PAGE_SIZE-1))
 
+/*
+ * the slab must be aligned such that load- and store-double instructions don't
+ * fault if used
+ */
+#define ARCH_KMALLOC_MINALIGN           (sizeof(long) * 2)
+#define ARCH_SLAB_MINALIGN              (sizeof(long) * 2)
+
 /*****************************************************************************/
 /*
  * virtual memory layout from kernel's point of view