[PATCH] FRV: Specify the minimum slab/kmalloc alignment

[David Howells]

From: David Howells <dhowells@xxxxxxxxxx>

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@xxxxxxxxxx>
---

 include/asm-frv/mem-layout.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)


diff --git a/include/asm-frv/mem-layout.h b/include/asm-frv/mem-layout.h
index 734a1d0..8a15c90 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

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