Add kernel-doc header template for arch_${atomic}_dec_if_positive
function family.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
---
include/linux/atomic/atomic-arch-fallback.h | 22 ++++++++++++++++++++-
scripts/atomic/fallbacks/dec_if_positive | 10 ++++++++++
2 files changed, 31 insertions(+), 1 deletion(-)
diff --git a/include/linux/atomic/atomic-arch-fallback.h b/include/linux/atomic/atomic-arch-fallback.h
index ed72d94346e9..4d4d94925cb0 100644
--- a/include/linux/atomic/atomic-arch-fallback.h
+++ b/include/linux/atomic/atomic-arch-fallback.h
@@ -1641,6 +1641,16 @@ arch_atomic_dec_unless_positive(atomic_t *v)
#endif
#ifndef arch_atomic_dec_if_positive
+/**
+ * arch_atomic_dec_if_positive - Atomic decrement if old value is positive
+ * @v: pointer of type atomic_t
+ *
+ * Atomically decrement @v, but only if the original value is greater than zero,
+ * returning new value. Note that the desired new value will be returned
+ * even if the decrement did not occur, so that if the old value is -3, then
+ * there @v will not be decremented, but -4 will be returned. As a result,
+ * if the return value is non-negative, then the value was in fact decremented.
+ */
static __always_inline int
arch_atomic_dec_if_positive(atomic_t *v)
{
@@ -3063,6 +3073,16 @@ arch_atomic64_dec_unless_positive(atomic64_t *v)
#endif
#ifndef arch_atomic64_dec_if_positive
+/**
+ * arch_atomic64_dec_if_positive - Atomic decrement if old value is positive
+ * @v: pointer of type atomic64_t
+ *
+ * Atomically decrement @v, but only if the original value is greater than zero,
+ * returning new value. Note that the desired new value will be returned
+ * even if the decrement did not occur, so that if the old value is -3, then
+ * there @v will not be decremented, but -4 will be returned. As a result,
+ * if the return value is non-negative, then the value was in fact decremented.
+ */
static __always_inline s64
arch_atomic64_dec_if_positive(atomic64_t *v)
{
@@ -3080,4 +3100,4 @@ arch_atomic64_dec_if_positive(atomic64_t *v)
#endif
#endif /* _LINUX_ATOMIC_FALLBACK_H */
-// 3b29d5595f48f921507f19bc794c91aecb782ad3
+// c7041896e7e66a52d8005ba021f3b3b05f99bcb3
diff --git a/scripts/atomic/fallbacks/dec_if_positive b/scripts/atomic/fallbacks/dec_if_positive
index 86bdced3428d..dedbdbc1487d 100755
--- a/scripts/atomic/fallbacks/dec_if_positive
+++ b/scripts/atomic/fallbacks/dec_if_positive
@@ -1,4 +1,14 @@
cat <<EOF
+/**
+ * arch_${atomic}_dec_if_positive - Atomic decrement if old value is positive
+ * @v: pointer of type ${atomic}_t
+ *
+ * Atomically decrement @v, but only if the original value is greater than zero,
+ * returning new value. Note that the desired new value will be returned
+ * even if the decrement did not occur, so that if the old value is -3, then
+ * there @v will not be decremented, but -4 will be returned. As a result,
+ * if the return value is non-negative, then the value was in fact decremented.
+ */
static __always_inline ${ret}
arch_${atomic}_dec_if_positive(${atomic}_t *v)
{
--
2.40.1
