diff options
| author | Chris Metcalf <cmetcalf@ezchip.com> | 2015-08-05 14:03:32 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-08-08 08:29:21 (GMT) |
| commit | 1eaef888158dc441dcd00c20779251cfa5e756b3 (patch) | |
| tree | b531f2097ab1b6d263e86ffa49e89516b02e61ae | |
| parent | bef033a3c68a0cd31c81973946be768e9dd7ba42 (diff) | |
| download | linux-1eaef888158dc441dcd00c20779251cfa5e756b3.tar.xz | |
tile: Reorganize _switch_to()
Move the simulator bits into finish_arch_post_lock_switch() and
properly call __switch_to() from _switch_to().
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Cc: <efault@gmx.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1438783412-10990-1-git-send-email-cmetcalf@ezchip.com
[ Made it a delta to: fe363adb9225 ("sched, tile: Remove finish_arch_switch"). ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/tile/include/asm/switch_to.h | 2 | ||||
| -rw-r--r-- | arch/tile/kernel/process.c | 16 |
2 files changed, 6 insertions, 12 deletions
diff --git a/arch/tile/include/asm/switch_to.h b/arch/tile/include/asm/switch_to.h index 422842a..34ee727 100644 --- a/arch/tile/include/asm/switch_to.h +++ b/arch/tile/include/asm/switch_to.h @@ -56,6 +56,8 @@ extern unsigned long get_switch_to_pc(void); * We defer homecache migration until the runqueue lock is released. */ #define finish_arch_post_lock_switch() do { \ + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_OS_SWITCH | \ + (current->pid << _SIM_CONTROL_OPERATOR_BITS)); \ if (current->mm == NULL && !kstack_hash && \ current_thread_info()->homecache_cpu != raw_smp_processor_id()) \ homecache_migrate_kthread(); \ diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c index 1087375..7d57693 100644 --- a/arch/tile/kernel/process.c +++ b/arch/tile/kernel/process.c @@ -446,26 +446,18 @@ struct task_struct *__sched _switch_to(struct task_struct *prev, hardwall_switch_tasks(prev, next); #endif - /* - * Switch kernel SP, PC, and callee-saved registers. - * Pass the value to use for SYSTEM_SAVE_K_0 when we reset our sp. - * Once we return from this function we will have changed stacks - * and be running with current == next. - */ - __switch_to(prev, next, next_current_ksp0(next)); - - /* Notify the simulator of task switch and task exit. */ + /* Notify the simulator of task exit. */ if (unlikely(prev->state == TASK_DEAD)) __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_OS_EXIT | (prev->pid << _SIM_CONTROL_OPERATOR_BITS)); - __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_OS_SWITCH | - (next->pid << _SIM_CONTROL_OPERATOR_BITS)); /* + * Switch kernel SP, PC, and callee-saved registers. * In the context of the new task, return the old task pointer * (i.e. the task that actually called __switch_to). + * Pass the value to use for SYSTEM_SAVE_K_0 when we reset our sp. */ - return prev; + return __switch_to(prev, next, next_current_ksp0(next)); } /* |