VisionFive2 Linux kernel

author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> 2019-03-26 18:31:29 +0100 committer: Minda Chen <minda.chen@starfivetech.com> 2023-11-06 19:24:53 +0800 commit: 6156a09a45d7fbacc22f5380ed2bbc35de718602 parent: e5786f65d0ad1855d6f53760c5720d9524838e80

Commit Summary:

powerpc/stackprotector: work around stack-guard init from atomic

Diffstat:

1 file changed, 4 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/stackprotector.h b/arch/powerpc/include/asm/stackprotector.h
index 1c8460e23583..b1653c160bab 100644
--- a/arch/powerpc/include/asm/stackprotector.h
+++ b/arch/powerpc/include/asm/stackprotector.h
@@ -24,7 +24,11 @@ static __always_inline void boot_init_stack_canary(void)
 	unsigned long canary;
 
 	/* Try to get a semi random initial value. */
+#ifdef CONFIG_PREEMPT_RT
+	canary = (unsigned long)&canary;
+#else
 	canary = get_random_canary();
+#endif
 	canary ^= mftb();
 	canary ^= LINUX_VERSION_CODE;
 	canary &= CANARY_MASK;