Commit 192c5807 authored Mar 11, 2018 by Dominik Brodowski

kernel: add do_getpgid() helper; remove internal call to sys_getpgid()

Using the do_getpgid() helper removes an in-kernel call to the
sys_getpgid() 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: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

parent 31c213f2

kernel/sys.c

+7 −2

Original line number	Diff line number	Diff line
		@@ -1027,7 +1027,7 @@ SYSCALL_DEFINE2(setpgid, pid_t, pid, pid_t, pgid)
		return err;
		}

		SYSCALL_DEFINE1(getpgid, pid_t, pid)
		static int do_getpgid(pid_t pid)
		{
		struct task_struct *p;
		struct pid *grp;
		@@ -1055,11 +1055,16 @@ SYSCALL_DEFINE1(getpgid, pid_t, pid)
		return retval;
		}

		SYSCALL_DEFINE1(getpgid, pid_t, pid)
		{
		return do_getpgid(pid);
		}

		#ifdef __ARCH_WANT_SYS_GETPGRP

		SYSCALL_DEFINE0(getpgrp)
		{
		return sys_getpgid(0);
		return do_getpgid(0);
		}

		#endif