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authorDave Martin <Dave.Martin@arm.com>2017-07-25 12:52:41 +0100
committerWill Deacon <will.deacon@arm.com>2017-07-26 09:28:18 +0100
commitd0153c7ff9226535a51e6a81f61656c9500957f4 (patch)
tree005461318580d5c57c435e8347eb5407857bfed2 /arch
parent6c17c1c3099d7367e67d51290884846dfeecf7bf (diff)
downloadlinux-d0153c7ff9226535a51e6a81f61656c9500957f4.tar.bz2
arm64: sysreg: Fix unprotected macro argmuent in write_sysreg
write_sysreg() may misparse the value argument because it is used without parentheses to protect it. This patch adds the ( ) in order to avoid any surprises. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com> [will: same change to write_sysreg_s] Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/include/asm/sysreg.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 16e44fa9b3b6..248339e4aaf5 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -492,7 +492,7 @@ asm(
* the "%x0" template means XZR.
*/
#define write_sysreg(v, r) do { \
- u64 __val = (u64)v; \
+ u64 __val = (u64)(v); \
asm volatile("msr " __stringify(r) ", %x0" \
: : "rZ" (__val)); \
} while (0)
@@ -508,7 +508,7 @@ asm(
})
#define write_sysreg_s(v, r) do { \
- u64 __val = (u64)v; \
+ u64 __val = (u64)(v); \
asm volatile("msr_s " __stringify(r) ", %x0" : : "rZ" (__val)); \
} while (0)