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Commit 90c53e65 authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

s390: move cputime accounting fields from thread_info to thread_struct 



The user_timer and system_timer fields are used for the per-thread
cputime accounting code. The access to these values is simpler if
they are moved to the thread_struct as the task_thread_info(tsk)
indirection is not needed anymore.

Reviewed-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent f8fc82b4

arch/s390/include/asm/processor.h

+2 −0
Original line number Diff line number Diff line
@@ -110,6 +110,8 @@ typedef struct { 
struct thread_struct {

	unsigned int  acrs[NUM_ACRS];

        unsigned long ksp;              /* kernel stack pointer             */

	unsigned long user_timer;	/* task cputime in user space */

	unsigned long system_timer;	/* task cputime in kernel space */

	mm_segment_t mm_segment;

	unsigned long gmap_addr;	/* address of last gmap fault. */

	unsigned int gmap_write_flag;	/* gmap fault write indication */

arch/s390/include/asm/thread_info.h

+0 −2
Original line number Diff line number Diff line
@@ -32,8 +32,6 @@ 
struct thread_info {

	unsigned long		flags;		/* low level flags */

	unsigned long		sys_call_table;	/* System call table address */

	__u64			user_timer;

	__u64			system_timer;

	unsigned long		last_break;	/* last breaking-event-address. */

};

arch/s390/kernel/asm-offsets.c

+0 −2
Original line number Diff line number Diff line
@@ -41,8 +41,6 @@ int main(void) 
	/* thread info offsets */

	OFFSET(__TI_flags, task_struct, thread_info.flags);

	OFFSET(__TI_sysc_table,  task_struct, thread_info.sys_call_table);

	OFFSET(__TI_user_timer, task_struct, thread_info.user_timer);

	OFFSET(__TI_system_timer, task_struct, thread_info.system_timer);

	OFFSET(__TI_last_break, task_struct, thread_info.last_break);

	BLANK();

	/* pt_regs offsets */

arch/s390/kernel/process.c

+2 −4
Original line number Diff line number Diff line
@@ -103,7 +103,6 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) 
int copy_thread(unsigned long clone_flags, unsigned long new_stackp,

		unsigned long arg, struct task_struct *p)

{

	struct thread_info *ti;

	struct fake_frame

	{

		struct stack_frame sf;
@@ -121,9 +120,8 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp, 
	memset(&p->thread.per_event, 0, sizeof(p->thread.per_event));

	clear_tsk_thread_flag(p, TIF_SINGLE_STEP);

	/* Initialize per thread user and system timer values */

	ti = task_thread_info(p);

	ti->user_timer = 0;

	ti->system_timer = 0;

	p->thread.user_timer = 0;

	p->thread.system_timer = 0;



	frame->sf.back_chain = 0;

	/* new return point is ret_from_fork */

arch/s390/kernel/smp.c

+2 −3
Original line number Diff line number Diff line
@@ -259,15 +259,14 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu) 
static void pcpu_attach_task(struct pcpu *pcpu, struct task_struct *tsk)

{

	struct lowcore *lc = pcpu->lowcore;

	struct thread_info *ti = task_thread_info(tsk);



	lc->kernel_stack = (unsigned long) task_stack_page(tsk)

		+ THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);

	lc->current_task = (unsigned long) tsk;

	lc->lpp = LPP_MAGIC;

	lc->current_pid = tsk->pid;

	lc->user_timer = ti->user_timer;

	lc->system_timer = ti->system_timer;

	lc->user_timer = tsk->thread.user_timer;

	lc->system_timer = tsk->thread.system_timer;

	lc->steal_timer = 0;

}