sh: Default to 4-byte alignment for SLUB objects.

Slub currently defaults to 8-byte alignment for the kmalloc
and slab minalign values, where 4 will suffice. In the slab
case BYTES_PER_WORD == 4 already, so defining the minalign
values outright doesn't cause any regressions there either.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

include/asm-sh/page.h

@@ -151,5 +151,12 @@ typedef struct { unsigned long pgd; } pgd_t;
 #define __HAVE_ARCH_GATE_AREA
 #endif
 
+/*
+ * Slub defaults to 8-byte alignment, we're only interested in 4.
+ * Slab defaults to BYTES_PER_WORD, which ends up being the same anyways.
+ */
+#define ARCH_KMALLOC_MINALIGN	4
+#define ARCH_SLAB_MINALIGN	4
+
 #endif /* __KERNEL__ */
 #endif /* __ASM_SH_PAGE_H */