Unverified Commit 257b1c2c authored by Christian Brauner's avatar Christian Brauner
Browse files

file: add fput() cleanup helper 

Add a simple helper to put a file reference.

Link: https://lore.kernel.org/r/20240719-work-mount-namespace-v1-4-834113cab0d2@kernel.org


Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Reviewed-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent 5fcf3296

include/linux/file.h

+2 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/posix_types.h>

#include <linux/errno.h>

#include <linux/cleanup.h>

#include <linux/err.h>



struct file;
@@ -96,6 +97,7 @@ extern void put_unused_fd(unsigned int fd); 


DEFINE_CLASS(get_unused_fd, int, if (_T >= 0) put_unused_fd(_T),

	     get_unused_fd_flags(flags), unsigned flags)

DEFINE_FREE(fput, struct file *, if (!IS_ERR_OR_NULL(_T)) fput(_T))



/*

 * take_fd() will take care to set @fd to -EBADF ensuring that