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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-27 09:06:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-27 09:06:10 -0800 |
| commit | 6be5f58215f1dcbd697a695ad5db9986c28c50c3 (patch) | |
| tree | 4a987abf93880357f67609c992dd203ac8eb2fbc | |
| parent | 2eeefc60ad70ffb7a5daf9f47aef5b1ebd1f39ad (diff) | |
| parent | 91ea62d58bd661827c328a2c6c02a87fa4aae88b (diff) | |
| download | linux-6be5f58215f1dcbd697a695ad5db9986c28c50c3.tar.bz2 | |
Merge tag 'locking-urgent-2020-12-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Ingo Molnar:
"Misc fixes/updates:
- Fix static keys usage in module __init sections
- Add separate MAINTAINERS entry for static branches/calls
- Fix lockdep splat with CONFIG_PREEMPTIRQ_EVENTS=y tracing"
* tag 'locking-urgent-2020-12-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
softirq: Avoid bad tracing / lockdep interaction
jump_label/static_call: Add MAINTAINERS
jump_label: Fix usage in module __init
| -rw-r--r-- | MAINTAINERS | 16 | ||||
| -rw-r--r-- | kernel/jump_label.c | 8 | ||||
| -rw-r--r-- | kernel/softirq.c | 2 |
3 files changed, 22 insertions, 4 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 154c87032bae..546aa66428c9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -16917,6 +16917,22 @@ M: Ion Badulescu <ionut@badula.org> S: Odd Fixes F: drivers/net/ethernet/adaptec/starfire* +STATIC BRANCH/CALL +M: Peter Zijlstra <peterz@infradead.org> +M: Josh Poimboeuf <jpoimboe@redhat.com> +M: Jason Baron <jbaron@akamai.com> +R: Steven Rostedt <rostedt@goodmis.org> +R: Ard Biesheuvel <ardb@kernel.org> +S: Supported +F: arch/*/include/asm/jump_label*.h +F: arch/*/include/asm/static_call*.h +F: arch/*/kernel/jump_label.c +F: arch/*/kernel/static_call.c +F: include/linux/jump_label*.h +F: include/linux/static_call*.h +F: kernel/jump_label.c +F: kernel/static_call.c + STEC S1220 SKD DRIVER M: Damien Le Moal <Damien.LeMoal@wdc.com> L: linux-block@vger.kernel.org diff --git a/kernel/jump_label.c b/kernel/jump_label.c index 015ef903ce8c..c6a39d662935 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -793,6 +793,7 @@ int jump_label_text_reserved(void *start, void *end) static void jump_label_update(struct static_key *key) { struct jump_entry *stop = __stop___jump_table; + bool init = system_state < SYSTEM_RUNNING; struct jump_entry *entry; #ifdef CONFIG_MODULES struct module *mod; @@ -804,15 +805,16 @@ static void jump_label_update(struct static_key *key) preempt_disable(); mod = __module_address((unsigned long)key); - if (mod) + if (mod) { stop = mod->jump_entries + mod->num_jump_entries; + init = mod->state == MODULE_STATE_COMING; + } preempt_enable(); #endif entry = static_key_entries(key); /* if there are no users, entry can be NULL */ if (entry) - __jump_label_update(key, entry, stop, - system_state < SYSTEM_RUNNING); + __jump_label_update(key, entry, stop, init); } #ifdef CONFIG_STATIC_KEYS_SELFTEST diff --git a/kernel/softirq.c b/kernel/softirq.c index d5bfd5e661fc..9d71046ea247 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -186,7 +186,7 @@ void __local_bh_enable_ip(unsigned long ip, unsigned int cnt) * Keep preemption disabled until we are done with * softirq processing: */ - preempt_count_sub(cnt - 1); + __preempt_count_sub(cnt - 1); if (unlikely(!in_interrupt() && local_softirq_pending())) { /* |