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fs: add do_futimesat() helper; remove internal call to sys_futimesat()

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Using this helper removes the in-kernel call to the sys_futimesat()
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>
This commit is contained in:
Dominik Brodowski 2018-03-11 11:34:29 +01:00
parent ee81feb64e
commit f13903587c
1 changed files with 10 additions and 3 deletions
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13
fs/utimes.c
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@ -184,8 +184,8 @@ SYSCALL_DEFINE4(utimensat, int, dfd, const char __user *, filename,
return do_utimes(dfd, filename, utimes ? tstimes : NULL, flags);
}
SYSCALL_DEFINE3(futimesat, int, dfd, const char __user *, filename,
struct timeval __user *, utimes)
static long do_futimesat(int dfd, const char __user *filename,
struct timeval __user *utimes)
{
struct timeval times[2];
struct timespec64 tstimes[2];
@ -212,10 +212,17 @@ SYSCALL_DEFINE3(futimesat, int, dfd, const char __user *, filename,
return do_utimes(dfd, filename, utimes ? tstimes : NULL, 0);
}
SYSCALL_DEFINE3(futimesat, int, dfd, const char __user *, filename,
struct timeval __user *, utimes)
{
return do_futimesat(dfd, filename, utimes);
}
SYSCALL_DEFINE2(utimes, char __user *, filename,
struct timeval __user *, utimes)
{
return sys_futimesat(AT_FDCWD, filename, utimes);
return do_futimesat(AT_FDCWD, filename, utimes);
}
#ifdef CONFIG_COMPAT