y2038: sched: Change sched_rr_get_interval to use __kernel_timespec (474b9c77) · Commits · 戴 / test

This is a preparation patch for converting sys_sched_rr_get_interval to work with 64-bit time_t on 32-bit architectures. The 'interval' argument is changed to struct __kernel_timespec, which will be redefined using 64-bit time_t in the future. The compat version of the system call in turn is enabled for compilation with CONFIG_COMPAT_32BIT_TIME so the individual 32-bit architectures can share the handling of the traditional argument with 64-bit architectures providing it for their compat mode. Signed-off-by:

Arnd Bergmann <arnd@arndb.de>

include/linux/syscalls.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -614,7 +614,7 @@ asmlinkage long sys_sched_yield(void);
		asmlinkage long sys_sched_get_priority_max(int policy);
		asmlinkage long sys_sched_get_priority_min(int policy);
		asmlinkage long sys_sched_rr_get_interval(pid_t pid,
		struct timespec __user *interval);
		struct __kernel_timespec __user *interval);

		/* kernel/signal.c */
		asmlinkage long sys_restart_syscall(void);

kernel/sched/core.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -5243,7 +5243,7 @@ out_unlock:
		* an error code.
		*/
		SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
		struct timespec __user *, interval)
		struct __kernel_timespec __user *, interval)
		{
		struct timespec64 t;
		int retval = sched_rr_get_interval(pid, &t);
		@@ -5254,7 +5254,7 @@ SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
		return retval;
		}

		#ifdef CONFIG_COMPAT
		#ifdef CONFIG_COMPAT_32BIT_TIME
		COMPAT_SYSCALL_DEFINE2(sched_rr_get_interval,
		compat_pid_t, pid,
		struct old_timespec32 __user *, interval)

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