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authorMark Rutland <mark.rutland@arm.com>2021-07-13 13:52:52 +0300
committerPeter Zijlstra <peterz@infradead.org>2021-07-16 19:46:45 +0300
commit67d1b0de258ad066e1fc85d0ceaa75e107fb45bb (patch)
tree6b566ab5fc960e44ddfd558b97ac5f381440ec35 /scripts/atomic
parente3d18cee258b898017b298b5b93f8134dd62aee3 (diff)
downloadlinux-67d1b0de258ad066e1fc85d0ceaa75e107fb45bb.tar.xz
locking/atomic: add arch_atomic_long*()
Now that all architectures provide arch_{atomic,atomic64}_*(), we can build arch_atomic_long_*() atop these, which can be safely used in noinstr code. The regular atomic_long_*() wrappers are built atop these, as we do for {atomic,atomic64}_*() atop arch_{atomic,atomic64}_*(). We don't provide arch_* versions of the cond_read*() variants, as we don't have arch_* versions of the underlying atomic/atomic64 functions (nor the smp_cond_load*() helpers these are typically based on). Note that the headers in this patch under include/linux/atomic/ are generated by the scripts in scripts/atomic/. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20210713105253.7615-5-mark.rutland@arm.com
Diffstat (limited to 'scripts/atomic')
-rwxr-xr-xscripts/atomic/gen-atomic-instrumented.sh5
-rwxr-xr-xscripts/atomic/gen-atomic-long.sh4
2 files changed, 7 insertions, 2 deletions
diff --git a/scripts/atomic/gen-atomic-instrumented.sh b/scripts/atomic/gen-atomic-instrumented.sh
index 6fc1ab772e40..035ceb4ee85c 100755
--- a/scripts/atomic/gen-atomic-instrumented.sh
+++ b/scripts/atomic/gen-atomic-instrumented.sh
@@ -138,6 +138,11 @@ grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
done
+grep '^[a-z]' "$1" | while read name meta args; do
+ gen_proto "${meta}" "${name}" "atomic_long" "long" ${args}
+done
+
+
for xchg in "xchg" "cmpxchg" "cmpxchg64" "try_cmpxchg"; do
for order in "" "_acquire" "_release" "_relaxed"; do
gen_xchg "${xchg}${order}" ""
diff --git a/scripts/atomic/gen-atomic-long.sh b/scripts/atomic/gen-atomic-long.sh
index db69572609df..eda89cea6e1d 100755
--- a/scripts/atomic/gen-atomic-long.sh
+++ b/scripts/atomic/gen-atomic-long.sh
@@ -47,9 +47,9 @@ gen_proto_order_variant()
cat <<EOF
static __always_inline ${ret}
-atomic_long_${name}(${params})
+arch_atomic_long_${name}(${params})
{
- ${retstmt}${atomic}_${name}(${argscast});
+ ${retstmt}arch_${atomic}_${name}(${argscast});
}
EOF