From: Chris Metcalf <cmetcalf@ezchip.com>
Date: Wed, 7 Oct 2015 13:29:11 +0000 (-0400)
Subject: arch/powerpc: provide zero_bytemask() for big-endian
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7a5692e6e533fd379081ab06fb58f3f5ee4d80bc;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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

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>
---

diff --git a/arch/powerpc/include/asm/word-at-a-time.h b/arch/powerpc/include/asm/word-at-a-time.h
index 5b3a903adae6..e4396a7d0f7c 100644
--- 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 long val, unsigned long *data, const struct
 	return (val + c->high_bits) & ~rhs;
 }
 
+static inline unsigned long zero_bytemask(unsigned long mask)
+{
+	return ~1ul << __fls(mask);
+}
+
 #else
 
 #ifdef CONFIG_64BIT