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Subject[PATCH] slab: fix slab flags for archs use alignment larger 64-bit
Date
I think, this fix is necessary for all the architectures want to
perform DMA into kmalloc caches and need a guaranteed alignment
larger than the alignment of a 64-bit integer.
An example is sh architecture where ARCH_KMALLOC_MINALIGN is L1_CACHE_BYTES.

As side effect, these kind of objects cannot be visible
within the /proc/slab_allocators file.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
---
mm/slab.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index ddc41f3..031d785 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2262,7 +2262,7 @@ kmem_cache_create (const char *name, size_t size, size_t align,
ralign = align;
}
/* disable debug if necessary */
- if (ralign > __alignof__(unsigned long long))
+ if (ralign > ARCH_KMALLOC_MINALIGN)
flags &= ~(SLAB_RED_ZONE | SLAB_STORE_USER);
/*
* 4) Store it.
--
1.5.6.6


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