Patch "Revert "MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>."" has been added to the 4.12-stable tree

Patch "Revert "MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>."" has been added to the 4.12-stable tree

[gregkh]

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@vger.kernel.org> know about it.


>From ae5b0675942ab30cde96099c68a2290bd1aafcca Mon Sep 17 00:00:00 2001
From: Paul Burton <paul.burton@imgtec.com>
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@imgtec.com>

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@imgtec.com>
Fixes: 296e46db0073 ("MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>.")
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16895/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 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@imgtec.com are

queue-4.12/revert-mips-don-t-unnecessarily-include-kmalloc.h-into-asm-cache.h.patch