Commit da9bc726 authored by Ralf Baechle's avatar Ralf Baechle

[MIPS] SMTC: Don't set and restore irqregs ptr from self_ipi.

This did corrupt register s0 which the caller of self_ipi expects to
be unchanged.  This is a kernel bug which will only be triggered with
the compilers which compile __smtc_ipi_replay to use s0 across the
invocation of self_ipi. Gcc 4.1.2 does this, for example.
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent fbf6ede2
...@@ -121,10 +121,7 @@ LEAF(self_ipi) ...@@ -121,10 +121,7 @@ LEAF(self_ipi)
subu t1,sp,PT_SIZE subu t1,sp,PT_SIZE
sw ra,PT_EPC(t1) sw ra,PT_EPC(t1)
sw a0,PT_PADSLOT4(t1) sw a0,PT_PADSLOT4(t1)
LONG_L s0, TI_REGS($28)
LONG_S sp, TI_REGS($28)
la t2,ipi_decode la t2,ipi_decode
LONG_S s0, TI_REGS($28)
sw t2,PT_PADSLOT5(t1) sw t2,PT_PADSLOT5(t1)
/* Save pre-disable value of TCStatus */ /* Save pre-disable value of TCStatus */
sw t0,PT_TCSTATUS(t1) sw t0,PT_TCSTATUS(t1)
......
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