fs: drop unused fput_atomic definition

commit d7065da03822 ("get rid of the magic around f_count in aio") added fput_atomic to include/linux/fs.h, motivated by its use in __aio_put_req() in fs/aio.c.

Later, commit 3ffa3c0e3f6e ("aio: now fput() is OK from interrupt context; get rid of manual delayed __fput()") removed the only use of fput_atomic in __aio_put_req(), but did not remove the since then unused fput_atomic definition in include/linux/fs.h.

We curate this now and finally remove the unused definition.

This issue was identified during a code review due to a coccinelle warning from the atomic_as_refcounter.cocci rule pointing to the use of atomic_t in fput_atomic.

---
compile-tested with defconfig & allyesconfig on v4.20

 include/linux/fs.h | 1 -
 1 file changed, 1 deletion(-)

index 811c77743dad..ddf7de4d522b 100644
@@ -952,7 +952,6 @@ static inline struct file *get_file(struct file *f)
 	return f;
 }
 #define get_file_rcu(x) atomic_long_inc_not_zero(&(x)->f_count)
-#define fput_atomic(x)	atomic_long_add_unless(&(x)->f_count, -1, 1)
 #define file_count(x)	atomic_long_read(&(x)->f_count)
 
 #define	MAX_NON_LFS	((1UL<<31) - 1)

2.17.1