diff options
| author | Johannes Berg <[email protected]> | 2024-10-09 08:59:14 +0200 |
|---|---|---|
| committer | Johannes Berg <[email protected]> | 2024-10-09 08:59:22 +0200 |
| commit | a0efa2f362a69e47b9d8b48f770ef3a0249a7911 (patch) | |
| tree | 384d2c79a9b613213ef7591583d820d18c7be9c3 /kernel/printk/printk_safe.c | |
| parent | db03488897a70367aeafe82d07a78943d2a6068e (diff) | |
| parent | 36efaca9cb28a893cad98f0448c39a8b698859e2 (diff) | |
Merge net-next/main to resolve conflicts
The wireless-next tree was based on something older, and there
are now conflicts between -rc2 and work here. Merge net-next,
which has enough of -rc2 for the conflicts to happen, resolving
them in the process.
Signed-off-by: Johannes Berg <[email protected]>
Diffstat (limited to 'kernel/printk/printk_safe.c')
| -rw-r--r-- | kernel/printk/printk_safe.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/kernel/printk/printk_safe.c b/kernel/printk/printk_safe.c index 6d10927a07d8..2b35a9d3919d 100644 --- a/kernel/printk/printk_safe.c +++ b/kernel/printk/printk_safe.c @@ -26,6 +26,29 @@ void __printk_safe_exit(void) this_cpu_dec(printk_context); } +void __printk_deferred_enter(void) +{ + cant_migrate(); + __printk_safe_enter(); +} + +void __printk_deferred_exit(void) +{ + cant_migrate(); + __printk_safe_exit(); +} + +bool is_printk_legacy_deferred(void) +{ + /* + * The per-CPU variable @printk_context can be read safely in any + * context. CPU migration is always disabled when set. + */ + return (force_legacy_kthread() || + this_cpu_read(printk_context) || + in_nmi()); +} + asmlinkage int vprintk(const char *fmt, va_list args) { #ifdef CONFIG_KGDB_KDB @@ -38,7 +61,7 @@ asmlinkage int vprintk(const char *fmt, va_list args) * Use the main logbuf even in NMI. But avoid calling console * drivers that might have their own locks. */ - if (this_cpu_read(printk_context) || in_nmi()) + if (is_printk_legacy_deferred()) return vprintk_deferred(fmt, args); /* No obstacles. */ |