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Subject[PATCH 2/3] futex: Add missing annotation for wake_futex_pi()
Date
Sparse reports a warning at wake_futex_pi()

|warning: context imbalance in wake_futex_pi() - unexpected unlock
To fix this,
a __releases(&pi_state->pi_mutex.wait_lock) annotation is added
Given that wake_futex_pi() does actually call
raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock)
This not only fixes the warning
but also improves on the readability of the code.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
---
kernel/futex.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/futex.c b/kernel/futex.c
index 03c518e9747e..8bc288a7187f 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1549,6 +1549,7 @@ static void mark_wake_futex(struct wake_q_head *wake_q, struct futex_q *q)
* Caller must hold a reference on @pi_state.
*/
static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_pi_state *pi_state)
+ __releases(&pi_state->pi_mutex.wait_lock)
{
u32 uninitialized_var(curval), newval;
struct task_struct *new_owner;
--
2.24.1
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