[PATCH v2] lib: sbi: protect dprintf output with spinlock
From: Dong Du <hidden>
Date: 2021-08-28 06:45:02
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
Avoid getting messages from multiple harts (using dprintf and printf) concurrently with a spinlock serializaing calls to sbi_dprintf(), sbi_printf() and sbi_puts() Signed-off-by: Dong Du <redacted> --- lib/sbi/sbi_console.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/lib/sbi/sbi_console.c b/lib/sbi/sbi_console.c
index b54f7a2..29eede3 100644
--- a/lib/sbi/sbi_console.c
+++ b/lib/sbi/sbi_console.c@@ -387,8 +387,11 @@ int sbi_dprintf(const char *format, ...) struct sbi_scratch *scratch = sbi_scratch_thishart_ptr(); va_start(args, format); - if (scratch->options & SBI_SCRATCH_DEBUG_PRINTS) + if (scratch->options & SBI_SCRATCH_DEBUG_PRINTS) { + spin_lock(&console_out_lock); retval = print(NULL, NULL, format, args); + spin_unlock(&console_out_lock); + } va_end(args); return retval;
--
2.31.1