[PATCH v5 11/15] arch/x86: don't initialize kasan if it's disabled

[Baoquan He]

Here, kasan is disabled if specified 'kasan=off' in kernel cmdline.

Signed-off-by: Baoquan He <bhe at redhat.com>
Cc: x86 at kernel.org
---
 arch/x86/mm/kasan_init_64.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
index 998b6010d6d3..5ebf2850c77d 100644
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@ -343,6 +343,10 @@ void __init kasan_init(void)
 	unsigned long shadow_cea_begin, shadow_cea_per_cpu_begin, shadow_cea_end;
 	int i;
 
+	/* If KASAN is disabled via command line, don't initialize it. */
+	if (kasan_arg_disabled)
+		return;
+
 	memcpy(early_top_pgt, init_top_pgt, sizeof(early_top_pgt));
 
 	/*
-- 
2.52.0