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[MIPS] ret_from_irq adjustment

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Make sure that RA on top of interrupt stack is an address of ret_from_irq,
so that dump_stack etc. can trace info interrupted context.

Also this patch fixes except_vec_vi_handler and __smtc_ipi_vector which
seems broken.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2006-10-09 01:24:23 +09:00
committed by Ralf Baechle
parent 441ee341ad
commit f431baa55a
4 changed files with 19 additions and 23 deletions
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9
arch/mips/kernel/smtc-asm.S
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@@ -97,15 +97,12 @@ FEXPORT(__smtc_ipi_vector)
SAVE_ALL
CLI
TRACE_IRQS_OFF
move a0,sp
/* Function to be invoked passed stack pad slot 5 */
lw t0,PT_PADSLOT5(sp)
/* Argument from sender passed in stack pad slot 4 */
lw a1,PT_PADSLOT4(sp)
jalr t0
nop
j ret_from_irq
nop
lw a0,PT_PADSLOT4(sp)
PTR_LA ra, _ret_from_irq
jr t0
/*
* Called from idle loop to provoke processing of queued IPIs