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

PATCH [email protected] 1 participant 1 message Aug 7, 2017

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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 <[email protected]> know about it.

Quoted 1 line

From 7a5692e6e533fd379081ab06fb58f3f5ee4d80bc Mon Sep 17 00:00:00 2001

From: Chris Metcalf <[email protected]>
Date: Wed, 7 Oct 2015 09:29:11 -0400
Subject: arch/powerpc: provide zero_bytemask() for big-endian

From: Chris Metcalf <[email protected]>

commit 7a5692e6e533fd379081ab06fb58f3f5ee4d80bc upstream.

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

---
 arch/powerpc/include/asm/word-at-a-time.h |    5 +++++
 1 file changed, 5 insertions(+)
arch/powerpc/include/asm/word-at-a-time.h +5 -0
@@ -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 [email protected] 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