From: Richard Henderson <richard.henderson@linaro.org>
Date: Sun, 11 Jul 2021 15:46:37 +0000 (-0700)
Subject: qemu/atomic: Use macros for CONFIG_ATOMIC64
X-Git-Tag: qemu-xen-4.16.0-rc4~49^2~26
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=952fd6710e01037746de24f41e63cb4d8cbd49bc;p=qemu-xen.git

qemu/atomic: Use macros for CONFIG_ATOMIC64

Clang warnings about questionable atomic usage get localized
to the inline function in atomic.h.  By using a macro, we get
the full traceback to the original use that caused the warning.

Tested-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h
index 3ccf84fd46..a7654d2a33 100644
--- a/include/qemu/atomic.h
+++ b/include/qemu/atomic.h
@@ -457,26 +457,15 @@
 
 /* Abstractions to access atomically (i.e. "once") i64/u64 variables */
 #ifdef CONFIG_ATOMIC64
-static inline int64_t qatomic_read_i64(const int64_t *ptr)
-{
-    /* use __nocheck because sizeof(void *) might be < sizeof(u64) */
-    return qatomic_read__nocheck(ptr);
-}
-
-static inline uint64_t qatomic_read_u64(const uint64_t *ptr)
-{
-    return qatomic_read__nocheck(ptr);
-}
-
-static inline void qatomic_set_i64(int64_t *ptr, int64_t val)
-{
-    qatomic_set__nocheck(ptr, val);
-}
-
-static inline void qatomic_set_u64(uint64_t *ptr, uint64_t val)
-{
-    qatomic_set__nocheck(ptr, val);
-}
+/* Use __nocheck because sizeof(void *) might be < sizeof(u64) */
+#define qatomic_read_i64(P) \
+    _Generic(*(P), int64_t: qatomic_read__nocheck(P))
+#define qatomic_read_u64(P) \
+    _Generic(*(P), uint64_t: qatomic_read__nocheck(P))
+#define qatomic_set_i64(P, V) \
+    _Generic(*(P), int64_t: qatomic_set__nocheck(P, V))
+#define qatomic_set_u64(P, V) \
+    _Generic(*(P), uint64_t: qatomic_set__nocheck(P, V))
 
 static inline void qatomic64_init(void)
 {