Re: linux-next: manual merge of the pidfd tree with the y2038 tree (now block and tip trees)

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Hi all,

On Tue, 22 Jan 2019 14:10:27 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Today's linux-next merge of the pidfd tree got conflicts in:
> 
>   arch/x86/entry/syscalls/syscall_32.tbl
>   arch/x86/entry/syscalls/syscall_64.tbl
>   include/uapi/asm-generic/unistd.h
> 
> between commits:
> 
>   63a96220ad45 ("arch: add split IPC system calls where needed")
>   0bd4bb9c5612 ("y2038: add 64-bit time_t syscalls to all 32-bit architectures")
> 
> from the y2038 tree and commit:
> 
>   3d2991bc7a67 ("signal: add pidfd_send_signal() syscall")
> 
> from the pidfd tree.

This is now a conflict between the block, tip and pidfd trees.  The
resolution now looks like below.

> I fixed it up (I hope this resolution is better - see below) and can
> carry the fix as necessary. This is now fixed as far as linux-next is
> concerned, but any non trivial conflicts should be mentioned to your
> upstream maintainer when your tree is submitted for merging.  You may
> also want to consider cooperating with the maintainer of the
> conflicting tree to minimise any particularly complex conflicts.
-- 
Cheers,
Stephen Rothwell

diff --cc arch/x86/entry/syscalls/syscall_32.tbl
index 8da78595d69d,234d91df8ca6..000000000000
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@@ -396,39 -396,6 +396,40 @@@
  382	i386	pkey_free		sys_pkey_free			__ia32_sys_pkey_free
  383	i386	statx			sys_statx			__ia32_sys_statx
  384	i386	arch_prctl		sys_arch_prctl			__ia32_compat_sys_arch_prctl
 -385	i386	io_pgetevents		sys_io_pgetevents		__ia32_compat_sys_io_pgetevents
 +385	i386	io_pgetevents		sys_io_pgetevents_time32	__ia32_compat_sys_io_pgetevents
  386	i386	rseq			sys_rseq			__ia32_sys_rseq
 +# don't use numbers 387 through 392, add new calls at the end
 +393	i386	semget			sys_semget    			__ia32_sys_semget
 +394	i386	semctl			sys_semctl    			__ia32_compat_sys_semctl
 +395	i386	shmget			sys_shmget    			__ia32_sys_shmget
 +396	i386	shmctl			sys_shmctl    			__ia32_compat_sys_shmctl
 +397	i386	shmat			sys_shmat     			__ia32_compat_sys_shmat
 +398	i386	shmdt			sys_shmdt     			__ia32_sys_shmdt
 +399	i386	msgget			sys_msgget    			__ia32_sys_msgget
 +400	i386	msgsnd			sys_msgsnd    			__ia32_compat_sys_msgsnd
 +401	i386	msgrcv			sys_msgrcv    			__ia32_compat_sys_msgrcv
 +402	i386	msgctl			sys_msgctl    			__ia32_compat_sys_msgctl
 +403	i386	clock_gettime64		sys_clock_gettime		__ia32_sys_clock_gettime
 +404	i386	clock_settime64		sys_clock_settime		__ia32_sys_clock_settime
 +405	i386	clock_adjtime64		sys_clock_adjtime		__ia32_sys_clock_adjtime
 +406	i386	clock_getres_time64	sys_clock_getres		__ia32_sys_clock_getres
 +407	i386	clock_nanosleep_time64	sys_clock_nanosleep		__ia32_sys_clock_nanosleep
 +408	i386	timer_gettime64		sys_timer_gettime		__ia32_sys_timer_gettime
 +409	i386	timer_settime64		sys_timer_settime		__ia32_sys_timer_settime
 +410	i386	timerfd_gettime64	sys_timerfd_gettime		__ia32_sys_timerfd_gettime
 +411	i386	timerfd_settime64	sys_timerfd_settime		__ia32_sys_timerfd_settime
 +412	i386	utimensat_time64	sys_utimensat			__ia32_sys_utimensat
 +413	i386	pselect6_time64		sys_pselect6			__ia32_compat_sys_pselect6_time64
 +414	i386	ppoll_time64		sys_ppoll			__ia32_compat_sys_ppoll_time64
 +416	i386	io_pgetevents_time64	sys_io_pgetevents		__ia32_sys_io_pgetevents
 +417	i386	recvmmsg_time64		sys_recvmmsg			__ia32_compat_sys_recvmmsg_time64
 +418	i386	mq_timedsend_time64	sys_mq_timedsend		__ia32_sys_mq_timedsend
 +419	i386	mq_timedreceive_time64	sys_mq_timedreceive		__ia32_sys_mq_timedreceive
 +420	i386	semtimedop_time64	sys_semtimedop			__ia32_sys_semtimedop
 +421	i386	rt_sigtimedwait_time64	sys_rt_sigtimedwait		__ia32_compat_sys_rt_sigtimedwait_time64
 +422	i386	futex_time64		sys_futex			__ia32_sys_futex
 +423	i386	sched_rr_get_interval_time64	sys_sched_rr_get_interval	__ia32_sys_sched_rr_get_interval
+ 424	i386	pidfd_send_signal	sys_pidfd_send_signal		__ia32_sys_pidfd_send_signal
 +425	i386	io_uring_setup		sys_io_uring_setup		__ia32_sys_io_uring_setup
 +426	i386	io_uring_enter		sys_io_uring_enter		__ia32_sys_io_uring_enter
 +427	i386	io_uring_register	sys_io_uring_register		__ia32_sys_io_uring_register
diff --cc arch/x86/entry/syscalls/syscall_64.tbl
index c768447f97ec,58f4b3ad4fe0..000000000000
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@@ -343,11 -343,7 +343,12 @@@
  332	common	statx			__x64_sys_statx
  333	common	io_pgetevents		__x64_sys_io_pgetevents
  334	common	rseq			__x64_sys_rseq
 +# don't use numbers 387 through 423, add new calls after the last
 +# 'common' entry
+ 424	common	pidfd_send_signal	__x64_sys_pidfd_send_signal
 +425	common	io_uring_setup		__x64_sys_io_uring_setup
 +426	common	io_uring_enter		__x64_sys_io_uring_enter
 +427	common	io_uring_register	__x64_sys_io_uring_register
  
  #
  # x32-specific system call numbers start at 512 to avoid cache impact
diff --cc include/uapi/asm-generic/unistd.h
index 94fde9a14830,c861e7d1053b..000000000000
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@@ -740,58 -740,11 +740,60 @@@ __SC_COMP_3264(__NR_io_pgetevents, sys_
  __SYSCALL(__NR_rseq, sys_rseq)
  #define __NR_kexec_file_load 294
  __SYSCALL(__NR_kexec_file_load,     sys_kexec_file_load)
 +/* 295 through 402 are unassigned to sync up with generic numbers, don't use */
 +#if __BITS_PER_LONG == 32
 +#define __NR_clock_gettime64 403
 +__SYSCALL(__NR_clock_gettime64, sys_clock_gettime)
 +#define __NR_clock_settime64 404
 +__SYSCALL(__NR_clock_settime64, sys_clock_settime)
 +#define __NR_clock_adjtime64 405
 +__SYSCALL(__NR_clock_adjtime64, sys_clock_adjtime)
 +#define __NR_clock_getres_time64 406
 +__SYSCALL(__NR_clock_getres_time64, sys_clock_getres)
 +#define __NR_clock_nanosleep_time64 407
 +__SYSCALL(__NR_clock_nanosleep_time64, sys_clock_nanosleep)
 +#define __NR_timer_gettime64 408
 +__SYSCALL(__NR_timer_gettime64, sys_timer_gettime)
 +#define __NR_timer_settime64 409
 +__SYSCALL(__NR_timer_settime64, sys_timer_settime)
 +#define __NR_timerfd_gettime64 410
 +__SYSCALL(__NR_timerfd_gettime64, sys_timerfd_gettime)
 +#define __NR_timerfd_settime64 411
 +__SYSCALL(__NR_timerfd_settime64, sys_timerfd_settime)
 +#define __NR_utimensat_time64 412
 +__SYSCALL(__NR_utimensat_time64, sys_utimensat)
 +#define __NR_pselect6_time64 413
 +__SC_COMP(__NR_pselect6_time64, sys_pselect6, compat_sys_pselect6_time64)
 +#define __NR_ppoll_time64 414
 +__SC_COMP(__NR_ppoll_time64, sys_ppoll, compat_sys_ppoll_time64)
 +#define __NR_io_pgetevents_time64 416
 +__SYSCALL(__NR_io_pgetevents_time64, sys_io_pgetevents)
 +#define __NR_recvmmsg_time64 417
 +__SC_COMP(__NR_recvmmsg_time64, sys_recvmmsg, compat_sys_recvmmsg_time64)
 +#define __NR_mq_timedsend_time64 418
 +__SYSCALL(__NR_mq_timedsend_time64, sys_mq_timedsend)
 +#define __NR_mq_timedreceive_time64 419
 +__SYSCALL(__NR_mq_timedreceive_time64, sys_mq_timedreceive)
 +#define __NR_semtimedop_time64 420
 +__SYSCALL(__NR_semtimedop_time64, sys_semtimedop)
 +#define __NR_rt_sigtimedwait_time64 421
 +__SC_COMP(__NR_rt_sigtimedwait_time64, sys_rt_sigtimedwait, compat_sys_rt_sigtimedwait_time64)
 +#define __NR_futex_time64 422
 +__SYSCALL(__NR_futex_time64, sys_futex)
 +#define __NR_sched_rr_get_interval_time64 423
 +__SYSCALL(__NR_sched_rr_get_interval_time64, sys_sched_rr_get_interval)
 +#endif
+ #define __NR_pidfd_send_signal 424
+ __SYSCALL(__NR_pidfd_send_signal, sys_pidfd_send_signal)
 +#define __NR_io_uring_setup 425
 +__SYSCALL(__NR_io_uring_setup, sys_io_uring_setup)
 +#define __NR_io_uring_enter 426
 +__SYSCALL(__NR_io_uring_enter, sys_io_uring_enter)
 +#define __NR_io_uring_register 427
 +__SYSCALL(__NR_io_uring_register, sys_io_uring_register)
  
  #undef __NR_syscalls
 -#define __NR_syscalls 425
 +#define __NR_syscalls 428
  
  /*
   * 32 bit systems traditionally used different

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