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authorLinus Torvalds <torvalds@linux-foundation.org>2023-09-04 13:20:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2023-09-04 13:20:19 -0700
commit3c31041e37324e143bee98604bb31481e905b4b3 (patch)
tree30472b0ba7cf8ab56c657f5681b740bbd41797fe /kernel/debug
parent4accdb9895349026d85e526036ff28c07921d7cf (diff)
parentf0f692395353b99a54f7f6e5a8684d73af504879 (diff)
Merge tag 'printk-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek: - Do not try to get the console lock when it is not need or useful in panic() - Replace the global console_suspended state by a per-console flag - Export symbols needed for dumping the raw printk buffer in panic() - Fix documentation of printf formats for integer types - Moved Sergey Senozhatsky to the reviewer role - Misc cleanups * tag 'printk-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk: export symbols for debug modules lib: test_scanf: Add explicit type cast to result initialization in test_number_prefix() printk: ringbuffer: Fix truncating buffer size min_t cast printk: Rename abandon_console_lock_in_panic() to other_cpu_in_panic() printk: Add per-console suspended state printk: Consolidate console deferred printing printk: Do not take console lock for console_flush_on_panic() printk: Keep non-panic-CPUs out of console lock printk: Reduce console_unblank() usage in unsafe scenarios kdb: Do not assume write() callback available docs: printk-formats: Treat char as always unsigned docs: printk-formats: Fix hex printing of signed values MAINTAINERS: adjust printk/vsprintf entries
Diffstat (limited to 'kernel/debug')
-rw-r--r--kernel/debug/kdb/kdb_io.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index 813cb6cf72d6..9443bc63c5a2 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -590,6 +590,8 @@ static void kdb_msg_write(const char *msg, int msg_len)
continue;
if (c == dbg_io_ops->cons)
continue;
+ if (!c->write)
+ continue;
/*
* Set oops_in_progress to encourage the console drivers to
* disregard their internal spin locks: in the current calling