[PATCH] arm64: signal: Fix some under-bracketed UAPI macros

[Dave Martin]

A few SME-related sigcontext UAPI macros leave an argument
unprotected from misparsing during macro expansion.

Add parentheses around references to macro arguments where
appropriate.

Signed-off-by: Dave Martin <Dave.Martin at arm.com>
Fixes: ee072cf70804 ("arm64/sme: Implement signal handling for ZT")
Fixes: 39782210eb7e ("arm64/sme: Implement ZA signal handling")

---

Based on: v6.11-rc1

These were just spotted by inspection, but it seems a good idea to
sort them out anyway.  At worst, the change is harmless.

The way the macros are typically used (and the presumed lack of bug
reports) means that the chance of actually hitting these issues
appears low.

---
 arch/arm64/include/uapi/asm/sigcontext.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/include/uapi/asm/sigcontext.h b/arch/arm64/include/uapi/asm/sigcontext.h
index 8a45b7a411e0..57f76d82077e 100644
--- a/arch/arm64/include/uapi/asm/sigcontext.h
+++ b/arch/arm64/include/uapi/asm/sigcontext.h
@@ -320,10 +320,10 @@ struct zt_context {
 	((sizeof(struct za_context) + (__SVE_VQ_BYTES - 1))	\
 		/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
 
-#define ZA_SIG_REGS_SIZE(vq) ((vq * __SVE_VQ_BYTES) * (vq * __SVE_VQ_BYTES))
+#define ZA_SIG_REGS_SIZE(vq) (((vq) * __SVE_VQ_BYTES) * ((vq) * __SVE_VQ_BYTES))
 
 #define ZA_SIG_ZAV_OFFSET(vq, n) (ZA_SIG_REGS_OFFSET + \
-				  (SVE_SIG_ZREG_SIZE(vq) * n))
+				  (SVE_SIG_ZREG_SIZE(vq) * (n)))
 
 #define ZA_SIG_CONTEXT_SIZE(vq) \
 		(ZA_SIG_REGS_OFFSET + ZA_SIG_REGS_SIZE(vq))
@@ -334,7 +334,7 @@ struct zt_context {
 
 #define ZT_SIG_REGS_OFFSET sizeof(struct zt_context)
 
-#define ZT_SIG_REGS_SIZE(n) (ZT_SIG_REG_BYTES * n)
+#define ZT_SIG_REGS_SIZE(n) (ZT_SIG_REG_BYTES * (n))
 
 #define ZT_SIG_CONTEXT_SIZE(n) \
 	(sizeof(struct zt_context) + ZT_SIG_REGS_SIZE(n))

base-commit: 8400291e289ee6b2bf9779ff1c83a291501f017b
-- 
2.34.1