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

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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>
This commit is contained in:
Dominik Brodowski 2018-03-11 11:34:27 +01:00
parent 31c213f210
commit 192c58073d
1 changed files with 7 additions and 2 deletions
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9
kernel/sys.c
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@ -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