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| author | Tobias Klauser <tklauser@distanz.ch> | 2014-12-31 10:53:11 +0800 |
|---|---|---|
| committer | Ley Foon Tan <lftan@altera.com> | 2014-12-31 11:04:58 +0800 |
| commit | 1b0f44923e186b2f9383b3260f6b5fbfc77b9e4a (patch) | |
| tree | dfbb1e124873c802f99f81e569f28f1256cdbfbb /arch | |
| parent | 6f3d2b0075f74ab4f4aeca1622cd71f212a24c46 (diff) | |
| download | lwn-1b0f44923e186b2f9383b3260f6b5fbfc77b9e4a.tar.gz lwn-1b0f44923e186b2f9383b3260f6b5fbfc77b9e4a.zip | |
nios2: Use preempt_schedule_irq
Follow aa0d53260596 ("ia64: Use preempt_schedule_irq") and use
preempt_schedule_irq instead of enabling/disabling interrupts and
messing around with PREEMPT_ACTIVE in the nios2 low-level preemption
code ourselves. Also get rid of the now needless re-check for
TIF_NEED_RESCHED, preempt_schedule_irq will already take care of
rescheduling.
This also fixes the following build error when building with
CONFIG_PREEMPT:
arch/nios2/kernel/built-in.o: In function `need_resched':
arch/nios2/kernel/entry.S:374: undefined reference to `PREEMPT_ACTIVE'
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <lftan@altera.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/nios2/kernel/entry.S | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/arch/nios2/kernel/entry.S b/arch/nios2/kernel/entry.S index 83bca17d1008..0bdfd13ff98b 100644 --- a/arch/nios2/kernel/entry.S +++ b/arch/nios2/kernel/entry.S @@ -365,30 +365,14 @@ ENTRY(ret_from_interrupt) GET_THREAD_INFO r1 ldw r4, TI_PREEMPT_COUNT(r1) bne r4, r0, restore_all - -need_resched: ldw r4, TI_FLAGS(r1) /* ? Need resched set */ BTBZ r10, r4, TIF_NEED_RESCHED, restore_all ldw r4, PT_ESTATUS(sp) /* ? Interrupts off */ andi r10, r4, ESTATUS_EPIE beq r10, r0, restore_all - movia r4, PREEMPT_ACTIVE - stw r4, TI_PREEMPT_COUNT(r1) - rdctl r10, status /* enable intrs again */ - ori r10, r10 ,STATUS_PIE - wrctl status, r10 - PUSH r1 - call schedule - POP r1 - mov r4, r0 - stw r4, TI_PREEMPT_COUNT(r1) - rdctl r10, status /* disable intrs */ - andi r10, r10, %lo(~STATUS_PIE) - wrctl status, r10 - br need_resched -#else - br restore_all + call preempt_schedule_irq #endif + br restore_all /*********************************************************************** * A few syscall wrappers |