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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 13:34:55 +0300
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 21:16:00 +0300
commit2ca2a09d6215fd9621aa3e2db7cc9428a61f2911 (patch)
treea1999670bbdba36d98ba32fcca130dafcb238fd0 /fs/file.c
parent411d9475cf901b5a6d2996b46cb5726184a4fa50 (diff)
downloadlinux-2ca2a09d6215fd9621aa3e2db7cc9428a61f2911.tar.xz
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.c1
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)
{