Messages in this thread Patch in this message |  | | Date | Tue, 23 Apr 2019 17:21:02 +0200 | From | Oleg Nesterov <> | Subject | [PATCH] uprobes: use DEFINE_STATIC_PERCPU_RWSEM() to initialize dup_mmap_sem |
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Use DEFINE_STATIC_PERCPU_RWSEM() to initialize dup_mmap_sem.
Signed-off-by: Oleg Nesterov <oleg@redhat.com> --- kernel/events/uprobes.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index c5cde87..76c7380 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -46,7 +46,7 @@ static DEFINE_SPINLOCK(uprobes_treelock); /* serialize rbtree access */ static struct mutex uprobes_mmap_mutex[UPROBES_HASH_SZ]; #define uprobes_mmap_hash(v) (&uprobes_mmap_mutex[((unsigned long)(v)) % UPROBES_HASH_SZ]) -static struct percpu_rw_semaphore dup_mmap_sem; +DEFINE_STATIC_PERCPU_RWSEM(dup_mmap_sem); /* Have a copy of original instruction */ #define UPROBE_COPY_INSN 0 @@ -2301,9 +2301,6 @@ static int __init init_uprobes(void) for (i = 0; i < UPROBES_HASH_SZ; i++) mutex_init(&uprobes_mmap_mutex[i]); - if (percpu_init_rwsem(&dup_mmap_sem)) - return -ENOMEM; - return register_die_notifier(&uprobe_exception_nb); } __initcall(init_uprobes); -- 2.5.0
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