locking/atomic: remove fallback comments

Currently a subset of the fallback templates have kerneldoc comments,
resulting in a haphazard set of generated kerneldoc comments as only
some operations have fallback templates to begin with.

We'd like to generate more consistent kerneldoc comments, and to do so
we'll need to restructure the way the fallback code is generated.

To minimize churn and to make it easier to restructure the fallback
code, this patch removes the existing kerneldoc comments from the
fallback templates. We can add new kerneldoc comments in subsequent
patches.

There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230605070124.3741859-3-mark.rutland@arm.com

include/linux/atomic/atomic-arch-fallback.h

@@ -1272,15 +1272,6 @@ arch_atomic_try_cmpxchg(atomic_t *v, int *old, int new)
 #endif /* arch_atomic_try_cmpxchg_relaxed */
 
 #ifndef arch_atomic_sub_and_test
-/**
- * arch_atomic_sub_and_test - subtract value from variable and test result
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically subtracts @i from @v and returns
- * true if the result is zero, or false for all
- * other cases.
- */
 static __always_inline bool
 arch_atomic_sub_and_test(int i, atomic_t *v)
 {
@@ -1290,14 +1281,6 @@ arch_atomic_sub_and_test(int i, atomic_t *v)
 #endif
 
 #ifndef arch_atomic_dec_and_test
-/**
- * arch_atomic_dec_and_test - decrement and test
- * @v: pointer of type atomic_t
- *
- * Atomically decrements @v by 1 and
- * returns true if the result is 0, or false for all other
- * cases.
- */
 static __always_inline bool
 arch_atomic_dec_and_test(atomic_t *v)
 {
@@ -1307,14 +1290,6 @@ arch_atomic_dec_and_test(atomic_t *v)
 #endif
 
 #ifndef arch_atomic_inc_and_test
-/**
- * arch_atomic_inc_and_test - increment and test
- * @v: pointer of type atomic_t
- *
- * Atomically increments @v by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
 static __always_inline bool
 arch_atomic_inc_and_test(atomic_t *v)
 {
@@ -1331,14 +1306,6 @@ arch_atomic_inc_and_test(atomic_t *v)
 #endif /* arch_atomic_add_negative */
 
 #ifndef arch_atomic_add_negative
-/**
- * arch_atomic_add_negative - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_atomic_add_negative(int i, atomic_t *v)
 {
@@ -1348,14 +1315,6 @@ arch_atomic_add_negative(int i, atomic_t *v)
 #endif
 
 #ifndef arch_atomic_add_negative_acquire
-/**
- * arch_atomic_add_negative_acquire - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_atomic_add_negative_acquire(int i, atomic_t *v)
 {
@@ -1365,14 +1324,6 @@ arch_atomic_add_negative_acquire(int i, atomic_t *v)
 #endif
 
 #ifndef arch_atomic_add_negative_release
-/**
- * arch_atomic_add_negative_release - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_atomic_add_negative_release(int i, atomic_t *v)
 {
@@ -1382,14 +1333,6 @@ arch_atomic_add_negative_release(int i, atomic_t *v)
 #endif
 
 #ifndef arch_atomic_add_negative_relaxed
-/**
- * arch_atomic_add_negative_relaxed - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_atomic_add_negative_relaxed(int i, atomic_t *v)
 {
@@ -1437,15 +1380,6 @@ arch_atomic_add_negative(int i, atomic_t *v)
 #endif /* arch_atomic_add_negative_relaxed */
 
 #ifndef arch_atomic_fetch_add_unless
-/**
- * arch_atomic_fetch_add_unless - add unless the number is already a given value
- * @v: pointer of type atomic_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, so long as @v was not already @u.
- * Returns original value of @v
- */
 static __always_inline int
 arch_atomic_fetch_add_unless(atomic_t *v, int a, int u)
 {
@@ -1462,15 +1396,6 @@ arch_atomic_fetch_add_unless(atomic_t *v, int a, int u)
 #endif
 
 #ifndef arch_atomic_add_unless
-/**
- * arch_atomic_add_unless - add unless the number is already a given value
- * @v: pointer of type atomic_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, if @v was not already @u.
- * Returns true if the addition was done.
- */
 static __always_inline bool
 arch_atomic_add_unless(atomic_t *v, int a, int u)
 {
@@ -1480,13 +1405,6 @@ arch_atomic_add_unless(atomic_t *v, int a, int u)
 #endif
 
 #ifndef arch_atomic_inc_not_zero
-/**
- * arch_atomic_inc_not_zero - increment unless the number is zero
- * @v: pointer of type atomic_t
- *
- * Atomically increments @v by 1, if @v is non-zero.
- * Returns true if the increment was done.
- */
 static __always_inline bool
 arch_atomic_inc_not_zero(atomic_t *v)
 {
@@ -2488,15 +2406,6 @@ arch_atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new)
 #endif /* arch_atomic64_try_cmpxchg_relaxed */
 
 #ifndef arch_atomic64_sub_and_test
-/**
- * arch_atomic64_sub_and_test - subtract value from variable and test result
- * @i: integer value to subtract
- * @v: pointer of type atomic64_t
- *
- * Atomically subtracts @i from @v and returns
- * true if the result is zero, or false for all
- * other cases.
- */
 static __always_inline bool
 arch_atomic64_sub_and_test(s64 i, atomic64_t *v)
 {
@@ -2506,14 +2415,6 @@ arch_atomic64_sub_and_test(s64 i, atomic64_t *v)
 #endif
 
 #ifndef arch_atomic64_dec_and_test
-/**
- * arch_atomic64_dec_and_test - decrement and test
- * @v: pointer of type atomic64_t
- *
- * Atomically decrements @v by 1 and
- * returns true if the result is 0, or false for all other
- * cases.
- */
 static __always_inline bool
 arch_atomic64_dec_and_test(atomic64_t *v)
 {
@@ -2523,14 +2424,6 @@ arch_atomic64_dec_and_test(atomic64_t *v)
 #endif
 
 #ifndef arch_atomic64_inc_and_test
-/**
- * arch_atomic64_inc_and_test - increment and test
- * @v: pointer of type atomic64_t
- *
- * Atomically increments @v by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
 static __always_inline bool
 arch_atomic64_inc_and_test(atomic64_t *v)
 {
@@ -2547,14 +2440,6 @@ arch_atomic64_inc_and_test(atomic64_t *v)
 #endif /* arch_atomic64_add_negative */
 
 #ifndef arch_atomic64_add_negative
-/**
- * arch_atomic64_add_negative - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic64_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_atomic64_add_negative(s64 i, atomic64_t *v)
 {
@@ -2564,14 +2449,6 @@ arch_atomic64_add_negative(s64 i, atomic64_t *v)
 #endif
 
 #ifndef arch_atomic64_add_negative_acquire
-/**
- * arch_atomic64_add_negative_acquire - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic64_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_atomic64_add_negative_acquire(s64 i, atomic64_t *v)
 {
@@ -2581,14 +2458,6 @@ arch_atomic64_add_negative_acquire(s64 i, atomic64_t *v)
 #endif
 
 #ifndef arch_atomic64_add_negative_release
-/**
- * arch_atomic64_add_negative_release - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic64_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_atomic64_add_negative_release(s64 i, atomic64_t *v)
 {
@@ -2598,14 +2467,6 @@ arch_atomic64_add_negative_release(s64 i, atomic64_t *v)
 #endif
 
 #ifndef arch_atomic64_add_negative_relaxed
-/**
- * arch_atomic64_add_negative_relaxed - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic64_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_atomic64_add_negative_relaxed(s64 i, atomic64_t *v)
 {
@@ -2653,15 +2514,6 @@ arch_atomic64_add_negative(s64 i, atomic64_t *v)
 #endif /* arch_atomic64_add_negative_relaxed */
 
 #ifndef arch_atomic64_fetch_add_unless
-/**
- * arch_atomic64_fetch_add_unless - add unless the number is already a given value
- * @v: pointer of type atomic64_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, so long as @v was not already @u.
- * Returns original value of @v
- */
 static __always_inline s64
 arch_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u)
 {
@@ -2678,15 +2530,6 @@ arch_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u)
 #endif
 
 #ifndef arch_atomic64_add_unless
-/**
- * arch_atomic64_add_unless - add unless the number is already a given value
- * @v: pointer of type atomic64_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, if @v was not already @u.
- * Returns true if the addition was done.
- */
 static __always_inline bool
 arch_atomic64_add_unless(atomic64_t *v, s64 a, s64 u)
 {
@@ -2696,13 +2539,6 @@ arch_atomic64_add_unless(atomic64_t *v, s64 a, s64 u)
 #endif
 
 #ifndef arch_atomic64_inc_not_zero
-/**
- * arch_atomic64_inc_not_zero - increment unless the number is zero
- * @v: pointer of type atomic64_t
- *
- * Atomically increments @v by 1, if @v is non-zero.
- * Returns true if the increment was done.
- */
 static __always_inline bool
 arch_atomic64_inc_not_zero(atomic64_t *v)
 {
@@ -2761,4 +2597,4 @@ arch_atomic64_dec_if_positive(atomic64_t *v)
 #endif
 
 #endif /* _LINUX_ATOMIC_FALLBACK_H */
-// 52dfc6fe4a2e7234bbd2aa3e16a377c1db793a53
+// 9f0fd6ed53267c6ec64e36cd18e6fd8df57ea277

scripts/atomic/fallbacks/add_negative

 cat <<EOF
-/**
- * arch_${atomic}_add_negative${order} - Add and test if negative
- * @i: integer value to add
- * @v: pointer of type ${atomic}_t
- *
- * Atomically adds @i to @v and returns true if the result is negative,
- * or false when the result is greater than or equal to zero.
- */
 static __always_inline bool
 arch_${atomic}_add_negative${order}(${int} i, ${atomic}_t *v)
 {

scripts/atomic/fallbacks/add_unless

 cat << EOF
-/**
- * arch_${atomic}_add_unless - add unless the number is already a given value
- * @v: pointer of type ${atomic}_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, if @v was not already @u.
- * Returns true if the addition was done.
- */
 static __always_inline bool
 arch_${atomic}_add_unless(${atomic}_t *v, ${int} a, ${int} u)
 {

scripts/atomic/fallbacks/dec_and_test

 cat <<EOF
-/**
- * arch_${atomic}_dec_and_test - decrement and test
- * @v: pointer of type ${atomic}_t
- *
- * Atomically decrements @v by 1 and
- * returns true if the result is 0, or false for all other
- * cases.
- */
 static __always_inline bool
 arch_${atomic}_dec_and_test(${atomic}_t *v)
 {

scripts/atomic/fallbacks/fetch_add_unless

 cat << EOF
-/**
- * arch_${atomic}_fetch_add_unless - add unless the number is already a given value
- * @v: pointer of type ${atomic}_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, so long as @v was not already @u.
- * Returns original value of @v
- */
 static __always_inline ${int}
 arch_${atomic}_fetch_add_unless(${atomic}_t *v, ${int} a, ${int} u)
 {

scripts/atomic/fallbacks/inc_and_test

 cat <<EOF
-/**
- * arch_${atomic}_inc_and_test - increment and test
- * @v: pointer of type ${atomic}_t
- *
- * Atomically increments @v by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
 static __always_inline bool
 arch_${atomic}_inc_and_test(${atomic}_t *v)
 {

scripts/atomic/fallbacks/inc_not_zero

 cat <<EOF
-/**
- * arch_${atomic}_inc_not_zero - increment unless the number is zero
- * @v: pointer of type ${atomic}_t
- *
- * Atomically increments @v by 1, if @v is non-zero.
- * Returns true if the increment was done.
- */
 static __always_inline bool
 arch_${atomic}_inc_not_zero(${atomic}_t *v)
 {

scripts/atomic/fallbacks/sub_and_test

 cat <<EOF
-/**
- * arch_${atomic}_sub_and_test - subtract value from variable and test result
- * @i: integer value to subtract
- * @v: pointer of type ${atomic}_t
- *
- * Atomically subtracts @i from @v and returns
- * true if the result is zero, or false for all
- * other cases.
- */
 static __always_inline bool
 arch_${atomic}_sub_and_test(${int} i, ${atomic}_t *v)
 {