summaryrefslogtreecommitdiff
path: root/scripts
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-22 23:44:21 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-22 23:44:21 +0300
commitebd326ce724d5b2e5274724e6d6a46a046e28203 (patch)
tree9b043ea94d5afc02d08f19de5672b7a0a6f55882 /scripts
parent95ab0e87683edb6766e4992725aac13aca788ec6 (diff)
parentcd27ccfc727e99352321c0c75012ab9c5a90321e (diff)
downloadlinux-ebd326ce724d5b2e5274724e6d6a46a046e28203.tar.xz
Merge tag 'locking-core-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar: "Changes in this cycle were: Bitops & cpumask: - Always inline various generic helpers, to improve code generation, but also for instrumentation, found by noinstr validation. - Add a x86-specific cpumask_clear_cpu() helper to improve code generation Atomics: - Fix atomic64_{read_acquire,set_release} fallbacks Lockdep: - Fix /proc/lockdep output loop iteration for classes - Fix /proc/lockdep potential access to invalid memory - Add Mark Rutland as reviewer for atomic primitives - Minor cleanups Jump labels: - Clean up the code a bit Misc: - Add __sched annotations to percpu rwsem primitives - Enable RT_MUTEXES on PREEMPT_RT by default - Stray v8086_mode() inlining fix, result of noinstr objtool validation" * tag 'locking-core-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: jump_label: Refactor #ifdef of struct static_key jump_label: Avoid unneeded casts in STATIC_KEY_INIT_{TRUE,FALSE} locking/lockdep: Iterate lock_classes directly when reading lockdep files x86/ptrace: Always inline v8086_mode() for instrumentation cpumask: Add a x86-specific cpumask_clear_cpu() helper locking: Enable RT_MUTEXES by default on PREEMPT_RT. locking/local_lock: Make the empty local_lock_*() function a macro. atomics: Fix atomic64_{read_acquire,set_release} fallbacks locking: Add missing __sched attributes cpumask: Always inline helpers which use bit manipulation functions asm-generic/bitops: Always inline all bit manipulation helpers locking/lockdep: Avoid potential access of invalid memory in lock_class lockdep: Use memset_startat() helper in reinit_class() MAINTAINERS: add myself as reviewer for atomics
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/atomic/fallbacks/read_acquire11
-rwxr-xr-xscripts/atomic/fallbacks/set_release7
2 files changed, 16 insertions, 2 deletions
diff --git a/scripts/atomic/fallbacks/read_acquire b/scripts/atomic/fallbacks/read_acquire
index 803ba7561076..a0ea1d26e6b2 100755
--- a/scripts/atomic/fallbacks/read_acquire
+++ b/scripts/atomic/fallbacks/read_acquire
@@ -2,6 +2,15 @@ cat <<EOF
static __always_inline ${ret}
arch_${atomic}_read_acquire(const ${atomic}_t *v)
{
- return smp_load_acquire(&(v)->counter);
+ ${int} ret;
+
+ if (__native_word(${atomic}_t)) {
+ ret = smp_load_acquire(&(v)->counter);
+ } else {
+ ret = arch_${atomic}_read(v);
+ __atomic_acquire_fence();
+ }
+
+ return ret;
}
EOF
diff --git a/scripts/atomic/fallbacks/set_release b/scripts/atomic/fallbacks/set_release
index 86ede759f24e..05cdb7f42477 100755
--- a/scripts/atomic/fallbacks/set_release
+++ b/scripts/atomic/fallbacks/set_release
@@ -2,6 +2,11 @@ cat <<EOF
static __always_inline void
arch_${atomic}_set_release(${atomic}_t *v, ${int} i)
{
- smp_store_release(&(v)->counter, i);
+ if (__native_word(${atomic}_t)) {
+ smp_store_release(&(v)->counter, i);
+ } else {
+ __atomic_release_fence();
+ arch_${atomic}_set(v, i);
+ }
}
EOF