Add wait4() back to the set of <asm-generic/unistd.h> syscalls. (b51cae21) · Commits · 戴 / test

The initial pass at the generic ABI assumed that wait4() could be easily expressed using waitid(). Although it's true that wait4() can be built on waitid(), it's awkward enough that it makes more sense to continue to include wait4 in the generic syscall ABI. Since there is already a deprecated wait4 in the ABI, this change converts that wait4 into old_wait, and puts wait4 in the next available slot for new supported syscalls, after the platform-specific syscalls at number 260. Signed-off-by:

Chris Metcalf <cmetcalf@tilera.com> Acked-by:

Arnd Bergmann <arnd@arndb.de>

include/asm-generic/unistd.h

+6 −3

Original line number	Diff line number	Diff line
		@@ -638,8 +638,11 @@ __SYSCALL(__NR_recvmmsg, sys_recvmmsg)
		*/
		#define __NR_arch_specific_syscall 244

		#define __NR_wait4 260
		__SYSCALL(__NR_wait4, sys_wait4)

		#undef __NR_syscalls
		#define __NR_syscalls 260
		#define __NR_syscalls 261

		/*
		* All syscalls below here should go away really,
		@@ -776,8 +779,8 @@ __SYSCALL(__NR_epoll_wait, sys_epoll_wait)
		__SYSCALL(__NR_ustat, sys_ustat)
		#define __NR_vfork 1071
		__SYSCALL(__NR_vfork, sys_vfork)
		#define __NR_wait4 1072
		__SYSCALL(__NR_wait4, sys_wait4)
		#define __NR_oldwait4 1072
		__SYSCALL(__NR_oldwait4, sys_wait4)
		#define __NR_recv 1073
		__SYSCALL(__NR_recv, sys_recv)
		#define __NR_send 1074

scripts/checksyscalls.sh

+0 −1

Original line number	Diff line number	Diff line
		@@ -183,7 +183,6 @@ cat << EOF
		#define __IGNORE_ustat /* statfs */
		#define __IGNORE_utime /* utimes */
		#define __IGNORE_vfork /* clone */
		#define __IGNORE_wait4 /* waitid */

		/* sync_file_range had a stupid ABI. Allow sync_file_range2 instead */
		#ifdef __NR_sync_file_range2

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