Commit ab641afa authored by Dominik Brodowski's avatar Dominik Brodowski
Browse files

fs: add do_compat_futimesat() helper; remove in-kernel call to compat syscall 

Using the fs-internal do_compat_futimesat() helper allows us to get rid of
the fs-internal call to the compat_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: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent 570484bf

fs/utimes.c

+10 −2
Original line number Diff line number Diff line
@@ -260,7 +260,8 @@ COMPAT_SYSCALL_DEFINE4(utimensat, unsigned int, dfd, const char __user *, filena 
	return do_utimes(dfd, filename, t ? tv : NULL, flags);

}



COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd, const char __user *, filename, struct compat_timeval __user *, t)

static long do_compat_futimesat(unsigned int dfd, const char __user *filename,

				struct compat_timeval __user *t)

{

	struct timespec64 tv[2];
@@ -279,8 +280,15 @@ COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd, const char __user *, filena 
	return do_utimes(dfd, filename, t ? tv : NULL, 0);

}



COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd,

		       const char __user *, filename,

		       struct compat_timeval __user *, t)

{

	return do_compat_futimesat(dfd, filename, t);

}



COMPAT_SYSCALL_DEFINE2(utimes, const char __user *, filename, struct compat_timeval __user *, t)

{

	return compat_sys_futimesat(AT_FDCWD, filename, t);

	return do_compat_futimesat(AT_FDCWD, filename, t);

}

#endif