Re: [PATCH 0/8] Isolate time_t data types for clock/timer syscalls

From: Al Viro
Date: Mon Jun 19 2017 - 03:26:02 EST

On Sun, Jun 18, 2017 at 11:45:07PM -0700, Deepa Dinamani wrote:
> The series aims at isolating data conversions of time_t based structures:
> struct timespec and struct itimerspec at user space boundaries.
> This helps to later change the underlying types to handle y2038 changes
> to these.
> The series is an update to Arnd Bergmann's previous series:
> The series particularly aims at changing kernel clock and timer interfaces.
> The changes include
> a. Add data conversion apis for native and compat modes.
> b. Refactor nanosleep and clock_nanosleep logic:
> 1. Move nanosleep and its compat version to a new file nanosleep.c.
> Alternatively, these can be moved into hrtimer.c.
> 2. Refactor common functions for nanosleep: same functions
> are used for posix timers and posix stubs.
> 3. Change the posix clock callbacks to take advantage of these
> common functions.
> b. Move compat syscalls to the same files as the regular syscalls.
> c. Use data conversion apis in the regular and compat syscall paths.
> d. Remove set_fs()/get_fs() calls in the compat syscall path and
> use the same logic as in the regular syscall path.

Check the stuff already in tip/timers/core; at the very least it overlaps
considerably with your series. And your variant is a lot more convoluted -
there's no need to have a separate compat restart, etc.