Petr Mladek suggested we use
this_cpu_read(printk_context) & PRINTK_SAFE_CONTEXT_MASK
instead of checking the spinlock status in kmsan_pr_err()
This appears to be less intrusive, although we'll need to declare
printk_context in some printk header.
Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
To: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Vegard Nossum <vegard.nossum@xxxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
---
Change-Id: Idb5e7c7cedf6ab6ba635a64423d58d702ad3eca3
---
kernel/printk/printk_safe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/printk/printk_safe.c b/kernel/printk/printk_safe.c
index b4045e782743..5ebfc8bc5693 100644
--- a/kernel/printk/printk_safe.c
+++ b/kernel/printk/printk_safe.c
@@ -42,7 +42,7 @@ struct printk_safe_seq_buf {
};
static DEFINE_PER_CPU(struct printk_safe_seq_buf, safe_print_seq);
-static DEFINE_PER_CPU(int, printk_context);
+DEFINE_PER_CPU(int, printk_context);
#ifdef CONFIG_PRINTK_NMI
static DEFINE_PER_CPU(struct printk_safe_seq_buf, nmi_print_seq);
--
2.23.0.866.gb869b98d4c-goog
