diff options
| -rw-r--r-- | fs/aio.c | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -479,6 +479,7 @@ static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm) struct aio_ring *ring; spin_lock(&mm->ioctx_lock); + rcu_read_lock(); table = rcu_dereference(mm->ioctx_table); while (1) { @@ -487,6 +488,7 @@ static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm) if (!table->table[i]) { ctx->id = i; table->table[i] = ctx; + rcu_read_unlock(); spin_unlock(&mm->ioctx_lock); ring = kmap_atomic(ctx->ring_pages[0]); @@ -497,6 +499,7 @@ static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm) new_nr = (table ? table->nr : 1) * 4; + rcu_read_unlock(); spin_unlock(&mm->ioctx_lock); table = kzalloc(sizeof(*table) + sizeof(struct kioctx *) * @@ -507,6 +510,7 @@ static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm) table->nr = new_nr; spin_lock(&mm->ioctx_lock); + rcu_read_lock(); old = rcu_dereference(mm->ioctx_table); if (!old) { @@ -631,10 +635,12 @@ static void kill_ioctx(struct mm_struct *mm, struct kioctx *ctx) struct kioctx_table *table; spin_lock(&mm->ioctx_lock); + rcu_read_lock(); table = rcu_dereference(mm->ioctx_table); WARN_ON(ctx != table->table[ctx->id]); table->table[ctx->id] = NULL; + rcu_read_unlock(); spin_unlock(&mm->ioctx_lock); /* percpu_ref_kill() will do the necessary call_rcu() */ |