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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:55 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:16:00 +0200 |
| commit | 2ca2a09d6215fd9621aa3e2db7cc9428a61f2911 (patch) | |
| tree | a1999670bbdba36d98ba32fcca130dafcb238fd0 /fs/file.c | |
| parent | 411d9475cf901b5a6d2996b46cb5726184a4fa50 (diff) | |
| download | lwn-2ca2a09d6215fd9621aa3e2db7cc9428a61f2911.tar.gz lwn-2ca2a09d6215fd9621aa3e2db7cc9428a61f2911.zip | |
fs: add ksys_close() wrapper; remove in-kernel calls to sys_close()
Using the ksys_close() wrapper allows us to get rid of in-kernel calls
to the sys_close() syscall. The ksys_ prefix denotes that this function
is meant as a drop-in replacement for the syscall. In particular, it
uses the same calling convention as sys_close(), with one subtle
difference:
The few places which checked the return value did not care about the return
value re-writing in sys_close(), so simply use a wrapper around
__close_fd().
This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'fs/file.c')
| -rw-r--r-- | fs/file.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/file.c b/fs/file.c index d304004f0b65..7ffd6e9d103d 100644 --- a/fs/file.c +++ b/fs/file.c @@ -638,6 +638,7 @@ out_unlock: spin_unlock(&files->file_lock); return -EBADF; } +EXPORT_SYMBOL(__close_fd); /* for ksys_close() */ void do_close_on_exec(struct files_struct *files) { |