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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 11:34:28 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:15:35 +0200
commit0a216dd1cfe8a4966767e7e8c0bb90c3db163def (patch)
treec9af5d0a0c0adbc4b58bd971d2279d036b67fb6c
parent2dae0248061e6a8a2cccfb2ad01a76f674e40d72 (diff)
downloadlinux-0a216dd1cfe8a4966767e7e8c0bb90c3db163def.tar.bz2
fs: add do_pipe2() helper; remove internal call to sys_pipe2()
Using this helper removes an in-kernel call to the sys_pipe2() syscall. 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: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
-rw-r--r--fs/pipe.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/pipe.c b/fs/pipe.c
index 7b1954caf388..39d6f431da83 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -841,7 +841,7 @@ int do_pipe_flags(int *fd, int flags)
* sys_pipe() is the normal C calling standard for creating
* a pipe. It's not the way Unix traditionally does this, though.
*/
-SYSCALL_DEFINE2(pipe2, int __user *, fildes, int, flags)
+static int do_pipe2(int __user *fildes, int flags)
{
struct file *files[2];
int fd[2];
@@ -863,9 +863,14 @@ SYSCALL_DEFINE2(pipe2, int __user *, fildes, int, flags)
return error;
}
+SYSCALL_DEFINE2(pipe2, int __user *, fildes, int, flags)
+{
+ return do_pipe2(fildes, flags);
+}
+
SYSCALL_DEFINE1(pipe, int __user *, fildes)
{
- return sys_pipe2(fildes, 0);
+ return do_pipe2(fildes, 0);
}
static int wait_for_partner(struct pipe_inode_info *pipe, unsigned int *cnt)