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| author | Jan Kara <jack@suse.cz> | 2014-02-24 16:39:55 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-02-24 14:46:47 -0800 |
| commit | 5fd77595ec62141fa71e575bdbf410e0192f87d0 (patch) | |
| tree | 9c34d82ab352a92cc260861084b577b3a73f7cba /kernel/smp.c | |
| parent | 6d113398dcf4dfcd9787a4ead738b186f7b7ff0f (diff) | |
| download | linux-5fd77595ec62141fa71e575bdbf410e0192f87d0.tar.gz linux-5fd77595ec62141fa71e575bdbf410e0192f87d0.tar.bz2 linux-5fd77595ec62141fa71e575bdbf410e0192f87d0.zip | |
smp: Iterate functions through llist_for_each_entry_safe()
The IPI function llist iteration is open coded. Lets simplify this
with using an llist iterator.
Also we want to keep the iteration safe against possible
csd.llist->next value reuse from the IPI handler. At least the block
subsystem used to do such things so lets stay careful and use
llist_for_each_entry_safe().
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index ffee35bef179..e3852de042a6 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -151,7 +151,8 @@ static void generic_exec_single(int cpu, struct call_single_data *csd, int wait) */ void generic_smp_call_function_single_interrupt(void) { - struct llist_node *entry, *next; + struct llist_node *entry; + struct call_single_data *csd, *csd_next; /* * Shouldn't receive this interrupt on a cpu that is not yet online. @@ -161,16 +162,9 @@ void generic_smp_call_function_single_interrupt(void) entry = llist_del_all(&__get_cpu_var(call_single_queue)); entry = llist_reverse_order(entry); - while (entry) { - struct call_single_data *csd; - - next = entry->next; - - csd = llist_entry(entry, struct call_single_data, llist); + llist_for_each_entry_safe(csd, csd_next, entry, llist) { csd->func(csd->info); csd_unlock(csd); - - entry = next; } } |