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authorLinus Torvalds <torvalds@linux-foundation.org>2024-04-21 09:39:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2024-04-21 09:39:36 -0700
commit3b68086599f86f4be244ec7d1928c8a74cb9538d (patch)
treedab297b1b107a6690ef5306320c8aaeeec0b4ec3 /include
parentd07a0b861dfd8a525ffb015b05648fb4065c5bd2 (diff)
parentfe90f3967bdb3e13f133e5f44025e15f943a99c5 (diff)
Merge tag 'sched_urgent_for_v6.9_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Borislav Petkov: - Add a missing memory barrier in the concurrency ID mm switching * tag 'sched_urgent_for_v6.9_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Add missing memory barrier in switch_mm_cid
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/barrier.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-generic/barrier.h b/include/asm-generic/barrier.h
index 0c0695763bea..d4f581c1e21d 100644
--- a/include/asm-generic/barrier.h
+++ b/include/asm-generic/barrier.h
@@ -294,5 +294,13 @@ do { \
#define io_stop_wc() do { } while (0)
#endif
+/*
+ * Architectures that guarantee an implicit smp_mb() in switch_mm()
+ * can override smp_mb__after_switch_mm.
+ */
+#ifndef smp_mb__after_switch_mm
+# define smp_mb__after_switch_mm() smp_mb()
+#endif
+
#endif /* !__ASSEMBLY__ */
#endif /* __ASM_GENERIC_BARRIER_H */