From faa67424ecd60d87e7034f5a922285db2afaf797 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Tue, 5 Jul 2022 17:44:04 +0800 Subject: [PATCH] xtensa: fix stop_machine_cpuslocked call in patch_text stable inclusion from stable-v5.10.110 commit dac518bbcebf128f48b34701db8578f9f95485e3 bugzilla: https://gitee.com/openeuler/kernel/issues/I574AL Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=dac518bbcebf128f48b34701db8578f9f95485e3 -------------------------------- commit f406f2d03e07afc199dd8cf501f361dde6be8a69 upstream. patch_text must invoke patch_text_stop_machine on all online CPUs, but it calls stop_machine_cpuslocked with NULL cpumask. As a result only one CPU runs patch_text_stop_machine potentially leaving stale icache entries on other CPUs. Fix that by calling stop_machine_cpuslocked with cpu_online_mask as the last argument. Cc: stable@vger.kernel.org Fixes: 64711f9a47d4 ("xtensa: implement jump_label support") Signed-off-by: Max Filippov Signed-off-by: Greg Kroah-Hartman Signed-off-by: Yu Liao Reviewed-by: Wei Li Signed-off-by: Zheng Zengkai --- arch/xtensa/kernel/jump_label.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/xtensa/kernel/jump_label.c b/arch/xtensa/kernel/jump_label.c index 61cf6497a646..0dde21e0d3de 100644 --- a/arch/xtensa/kernel/jump_label.c +++ b/arch/xtensa/kernel/jump_label.c @@ -61,7 +61,7 @@ static void patch_text(unsigned long addr, const void *data, size_t sz) .data = data, }; stop_machine_cpuslocked(patch_text_stop_machine, - &patch, NULL); + &patch, cpu_online_mask); } else { unsigned long flags; -- GitLab