On Wed, Mar 14, 2018 at 5:03 AM, Deepa Dinamani <deepa.kernel@xxxxxxxxx> wrote: > The series is a preparation series for individual architectures > to use 64 bit time_t syscalls in compat and 32 bit emulation modes. > > This is a follow up to the series Arnd Bergmann posted: > https://sourceware.org/ml/libc-alpha/2015-05/msg00070.html [1] > > Thomas, Arnd, this seems ready to be merged now. > Can you help get this merged? > > Big picture is as per the lwn article: > https://lwn.net/Articles/643234/ [2] > > The series is directed at converting posix clock syscalls: > clock_gettime, clock_settime, clock_getres and clock_nanosleep > to use a new data structure __kernel_timespec at syscall boundaries. > __kernel_timespec maintains 64 bit time_t across all execution modes. > > vdso will be handled as part of each architecture when they enable > support for 64 bit time_t. > > The compat syscalls are repurposed to provide backward compatibility > by using them as native syscalls as well for 32 bit architectures. > They will continue to use timespec at syscall boundaries. > > CONFIG_64_BIT_TIME controls whether the syscalls use __kernel_timespec > or timespec at syscall boundaries. > > The series does the following: > 1. Enable compat syscalls on 32 bit architectures. > 2. Add a new __kernel_timespec type to be used as the data structure > for all the new syscalls. > 3. Add new config CONFIG_64BIT_TIME(intead of the CONFIG_COMPAT_TIME in > [1] and [2] to switch to new definition of __kernel_timespec. It is > the same as struct timespec otherwise. > 4. Add new CONFIG_32BIT_TIME to conditionally compile compat syscalls. I've applied all 10 patches to my y2038 git branch [1], which is part of linux-next, to give it a little wider testing. If everything goes well, I'd send a pull request to Thomas next week so he can integrate it into tip from there, or (if he prefers) send it directly to Linus in the merge window. Thanks a lot for your persistence and your work on this! Arnd [1] git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git#y2038
