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[3/4] riscv: switch set_icache_stale_mask() to using non-atomic assign_cpu()

Message ID 20250313021953.86035-4-yury.norov@gmail.com (mailing list archive)
State New
Headers show
Series cleanup dead code in nodemasks and cpumasks | expand

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Commit Message

Yury Norov March 13, 2025, 2:19 a.m. UTC 
The atomic cpumask_assign_cpu() follows non-atomic cpumask_setall(),
which makes the whole operation non-atomic. Fix this by relaxing to
non-atomic __assign_cpu().

Fixes: 7c1e5b9690b0e14 ("riscv: Disable preemption while handling PR_RISCV_CTX_SW_FENCEI_OFF")
Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
 arch/riscv/mm/cacheflush.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/riscv/mm/cacheflush.c b/arch/riscv/mm/cacheflush.c
index b81672729887..b8e96dfff19d 100644
--- a/arch/riscv/mm/cacheflush.c
+++ b/arch/riscv/mm/cacheflush.c
@@ -172,7 +172,7 @@  static void set_icache_stale_mask(void)
 	stale_cpu = cpumask_test_cpu(cpu, mask);
 
 	cpumask_setall(mask);
-	cpumask_assign_cpu(cpu, mask, stale_cpu);
+	__assign_cpu(cpu, mask, stale_cpu);
 	put_cpu();
 }
 #endif