Commit 3136b93c authored by Gabriel Krisman Bertazi's avatar Gabriel Krisman Bertazi Committed by Thomas Gleixner
Browse files

entry: Expose helpers to migrate TIF to SYSCALL_WORK flags 



With the goal to split the syscall work related flags into a separate
field that is architecture independent, expose transitional helpers that
resolve to either the TIF flags or to the corresponding SYSCALL_WORK
flags.  This will allow architectures to migrate only when they port to
the generic syscall entry code.

Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarAndy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20201116174206.2639648-3-krisman@collabora.com
parent b4581a52

include/linux/thread_info.h

+32 −0
Original line number Diff line number Diff line
@@ -97,6 +97,38 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag) 
#define test_thread_flag(flag) \

	test_ti_thread_flag(current_thread_info(), flag)



#ifdef CONFIG_GENERIC_ENTRY

#define set_syscall_work(fl) \

	set_bit(SYSCALL_WORK_BIT_##fl, &current_thread_info()->syscall_work)

#define test_syscall_work(fl) \

	test_bit(SYSCALL_WORK_BIT_##fl, &current_thread_info()->syscall_work)

#define clear_syscall_work(fl) \

	clear_bit(SYSCALL_WORK_BIT_##fl, &current_thread_info()->syscall_work)



#define set_task_syscall_work(t, fl) \

	set_bit(SYSCALL_WORK_BIT_##fl, &task_thread_info(t)->syscall_work)

#define test_task_syscall_work(t, fl) \

	test_bit(SYSCALL_WORK_BIT_##fl, &task_thread_info(t)->syscall_work)

#define clear_task_syscall_work(t, fl) \

	clear_bit(SYSCALL_WORK_BIT_##fl, &task_thread_info(t)->syscall_work)



#else /* CONFIG_GENERIC_ENTRY */



#define set_syscall_work(fl)						\

	set_ti_thread_flag(current_thread_info(), SYSCALL_WORK_##fl)

#define test_syscall_work(fl) \

	test_ti_thread_flag(current_thread_info(), SYSCALL_WORK_##fl)

#define clear_syscall_work(fl) \

	clear_ti_thread_flag(current_thread_info(), SYSCALL_WORK_##fl)



#define set_task_syscall_work(t, fl) \

	set_ti_thread_flag(task_thread_info(t), TIF_##fl)

#define test_task_syscall_work(t, fl) \

	test_ti_thread_flag(task_thread_info(t), TIF_##fl)

#define clear_task_syscall_work(t, fl) \

	clear_ti_thread_flag(task_thread_info(t), TIF_##fl)

#endif /* !CONFIG_GENERIC_ENTRY */



#define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED)



#ifndef CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES