[PATCH] futex: remove unused empty compat_exit_robust_list()

From: Lukas Bulwahn
Date: Fri Nov 13 2020 - 12:20:34 EST


Commit ba31c1a48538 ("futex: Move futex exit handling into futex code")
introduced compat_exit_robust_list() with a full-fledged implementation for
CONFIG_COMPAT, and an empty-body function for !CONFIG_COMPAT.
However, compat_exit_robust_list() is only used in futex_mm_release() under
ifdef CONFIG_COMPAT.

Hence for !CONFIG_COMPAT, make CC=clang W=1 warns:

kernel/futex.c:314:20:
warning: unused function 'compat_exit_robust_list' [-Wunused-function]

There is no need to declare the unused empty function for !CONFIG_COMPAT.
Simply, remove it to address the -Wunused-function warning.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
---
applies cleanly on current master and next-20201113

Thomas, please pick this minor non-urgent clean-up patch.

kernel/futex.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 00259c7e288e..c47d1015d759 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -310,8 +310,6 @@ static inline bool should_fail_futex(bool fshared)

#ifdef CONFIG_COMPAT
static void compat_exit_robust_list(struct task_struct *curr);
-#else
-static inline void compat_exit_robust_list(struct task_struct *curr) { }
#endif

/*
--
2.17.1