uprobes: Use DEFINE_STATIC_PERCPU_RWSEM() to initialize dup_mmap_sem (2bf1acc2) · Commits · 戴 / test

Use DEFINE_STATIC_PERCPU_RWSEM() to initialize dup_mmap_sem. Signed-off-by:

kernel/events/uprobes.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -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
		@@ -2302,7 +2302,5 @@ void __init uprobes_init(void)
		for (i = 0; i < UPROBES_HASH_SZ; i++)
		mutex_init(&uprobes_mmap_mutex[i]);

		BUG_ON(percpu_init_rwsem(&dup_mmap_sem));

		BUG_ON(register_die_notifier(&uprobe_exception_nb));
		}