Patch "arch/powerpc: provide zero_bytemask() for big-endian" has been added to the 3.18-stable tree

Patch "arch/powerpc: provide zero_bytemask() for big-endian" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    arch/powerpc: provide zero_bytemask() for big-endian

to the 3.18-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:
     arch-powerpc-provide-zero_bytemask-for-big-endian.patch
and it can be found in the queue-3.18 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 7a5692e6e533fd379081ab06fb58f3f5ee4d80bc Mon Sep 17 00:00:00 2001
From: Chris Metcalf <cmetcalf@ezchip.com>
Date: Wed, 7 Oct 2015 09:29:11 -0400
Subject: arch/powerpc: provide zero_bytemask() for big-endian

From: Chris Metcalf <cmetcalf@ezchip.com>

commit 7a5692e6e533fd379081ab06fb58f3f5ee4d80bc upstream.

For some reason, only the little-endian flavor of
powerpc provided the zero_bytemask() implementation.

Reported-by: Michal Sojka <sojkam1@fel.cvut.cz>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/include/asm/word-at-a-time.h |    5 +++++
 1 file changed, 5 insertions(+)

--- a/arch/powerpc/include/asm/word-at-a-time.h
+++ b/arch/powerpc/include/asm/word-at-a-time.h
@@ -40,6 +40,11 @@ static inline bool has_zero(unsigned lon
 	return (val + c->high_bits) & ~rhs;
 }
 
+static inline unsigned long zero_bytemask(unsigned long mask)
+{
+	return ~1ul << __fls(mask);
+}
+
 #else
 
 #ifdef CONFIG_64BIT


Patches currently in stable-queue which might be from cmetcalf@ezchip.com are

queue-3.18/strscpy-zero-any-trailing-garbage-bytes-in-the-destination.patch
queue-3.18/make-asm-word-at-a-time.h-available-on-all-architectures.patch
queue-3.18/word-at-a-time.h-support-zero_bytemask-on-alpha-and-tile.patch
queue-3.18/tile-use-global-strscpy-rather-than-private-copy.patch
queue-3.18/tile-add-asm-word-at-a-time.h-and-enable-support-functions.patch
queue-3.18/string-provide-strscpy.patch
queue-3.18/arch-powerpc-provide-zero_bytemask-for-big-endian.patch