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

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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/[email protected]

Cc: Al Viro <[email protected]>
Cc: Andrew Morton <[email protected]>
Signed-off-by: Dominik Brodowski <[email protected]>
This commit is contained in:
Dominik Brodowski committed 2018-04-02 20:15:44 +02:00
1 parent 570484bfe8
commit ab641afa73
1 file changed
+10 -2
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fs/utimes.c
+10 -2
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@@ -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