This is a note to let you know that I've just added the patch titled Revert "MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>." to the 4.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: revert-mips-don-t-unnecessarily-include-kmalloc.h-into-asm-cache.h.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ae5b0675942ab30cde96099c68a2290bd1aafcca Mon Sep 17 00:00:00 2001 From: Paul Burton <paul.burton@xxxxxxxxxx> Date: Tue, 1 Aug 2017 13:32:57 -0700 Subject: Revert "MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>." From: Paul Burton <paul.burton@xxxxxxxxxx> commit ae5b0675942ab30cde96099c68a2290bd1aafcca upstream. Commit 296e46db0073 ("MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>.") claimed that the inclusion of the machine's kmalloc.h from asm/cache.h is unnecessary, but this is not true. Without including kmalloc.h we don't get a definition for ARCH_DMA_MINALIGN, which means we no longer suitably align DMA. Further to this the definition of ARCH_KMALLOC_MINALIGN provided by linux/slab.h ends up being set to the alignment of an unsigned long long value rather than to ARCH_DMA_MINALIGN, which means that buffers allocated using kmalloc may no longer be safely aligned for use with DMA. Fix this by re-adding the include of kmalloc.h in asm/cache.h. This reverts commit 296e46db0073 ("MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>.") Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx> Fixes: 296e46db0073 ("MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>.") Cc: linux-mips@xxxxxxxxxxxxxx Patchwork: https://patchwork.linux-mips.org/patch/16895/ Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/mips/include/asm/cache.h | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/mips/include/asm/cache.h +++ b/arch/mips/include/asm/cache.h @@ -9,6 +9,8 @@ #ifndef _ASM_CACHE_H #define _ASM_CACHE_H +#include <kmalloc.h> + #define L1_CACHE_SHIFT CONFIG_MIPS_L1_CACHE_SHIFT #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) Patches currently in stable-queue which might be from paul.burton@xxxxxxxxxx are queue-4.12/revert-mips-don-t-unnecessarily-include-kmalloc.h-into-asm-cache.h.patch