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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

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Pull parisc fixes from Helge Deller:
 "Improve the stability of the linux kernel on the parisc architecture"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: sigaltstack doesn't round ss.ss_sp as required
  parisc: improve ptrace support for gdb single-step
  parisc: don't claim cpu irqs more than once
  parisc: avoid undefined shift in cnv_float.h
This commit is contained in:
Linus Torvalds 2013-01-22 14:30:35 -08:00
commit 343391b1d1
5 changed files with 27 additions and 16 deletions
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20
arch/parisc/kernel/entry.S
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@ -1865,7 +1865,7 @@ syscall_restore:
/* Are we being ptraced? */
ldw TASK_FLAGS(%r1),%r19
ldi (_TIF_SINGLESTEP|_TIF_BLOCKSTEP),%r2
ldi _TIF_SYSCALL_TRACE_MASK,%r2
and,COND(=) %r19,%r2,%r0
b,n syscall_restore_rfi
@ -1978,15 +1978,23 @@ syscall_restore_rfi:
/* sr2 should be set to zero for userspace syscalls */
STREG %r0,TASK_PT_SR2(%r1)
pt_regs_ok:
LDREG TASK_PT_GR31(%r1),%r2
depi 3,31,2,%r2 /* ensure return to user mode. */
STREG %r2,TASK_PT_IAOQ0(%r1)
depi 3,31,2,%r2 /* ensure return to user mode. */
STREG %r2,TASK_PT_IAOQ0(%r1)
ldo 4(%r2),%r2
STREG %r2,TASK_PT_IAOQ1(%r1)
copy %r25,%r16
b intr_restore
nop
copy %r25,%r16
pt_regs_ok:
LDREG TASK_PT_IAOQ0(%r1),%r2
depi 3,31,2,%r2 /* ensure return to user mode. */
STREG %r2,TASK_PT_IAOQ0(%r1)
LDREG TASK_PT_IAOQ1(%r1),%r2
depi 3,31,2,%r2
STREG %r2,TASK_PT_IAOQ1(%r1)
b intr_restore
copy %r25,%r16
.import schedule,code
syscall_do_resched:

6
arch/parisc/kernel/irq.c
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@ -410,11 +410,13 @@ void __init init_IRQ(void)
{
local_irq_disable(); /* PARANOID - should already be disabled */
mtctl(~0UL, 23); /* EIRR : clear all pending external intr */
claim_cpu_irqs();
#ifdef CONFIG_SMP
if (!cpu_eiem)
if (!cpu_eiem) {
claim_cpu_irqs();
cpu_eiem = EIEM_MASK(IPI_IRQ) | EIEM_MASK(TIMER_IRQ);
}
#else
claim_cpu_irqs();
cpu_eiem = EIEM_MASK(TIMER_IRQ);
#endif
set_eiem(cpu_eiem); /* EIEM : enable all external intr */

2
arch/parisc/kernel/ptrace.c
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@ -26,7 +26,7 @@
#include <asm/asm-offsets.h>
/* PSW bits we allow the debugger to modify */
#define USER_PSW_BITS (PSW_N | PSW_V | PSW_CB)
#define USER_PSW_BITS (PSW_N | PSW_B | PSW_V | PSW_CB)
/*
* Called by kernel/ptrace.c when detaching..

4
arch/parisc/kernel/signal.c
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@ -190,8 +190,10 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
DBG(1,"get_sigframe: ka = %#lx, sp = %#lx, frame_size = %#lx\n",
(unsigned long)ka, sp, frame_size);
/* Align alternate stack and reserve 64 bytes for the signal
handler's frame marker. */
if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp))
sp = current->sas_ss_sp; /* Stacks grow up! */
sp = (current->sas_ss_sp + 0x7f) & ~0x3f; /* Stacks grow up! */
DBG(1,"get_sigframe: Returning sp = %#lx\n", (unsigned long)sp);
return (void __user *) sp; /* Stacks grow up. Fun. */

11
arch/parisc/math-emu/cnv_float.h
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@ -347,16 +347,15 @@
Sgl_isinexact_to_fix(sgl_value,exponent)
#define Duint_from_sgl_mantissa(sgl_value,exponent,dresultA,dresultB) \
{Sall(sgl_value) <<= SGL_EXP_LENGTH; /* left-justify */ \
{unsigned int val = Sall(sgl_value) << SGL_EXP_LENGTH; \
if (exponent <= 31) { \
Dintp1(dresultA) = 0; \
Dintp2(dresultB) = (unsigned)Sall(sgl_value) >> (31 - exponent); \
Dintp1(dresultA) = 0; \
Dintp2(dresultB) = val >> (31 - exponent); \
} \
else { \
Dintp1(dresultA) = Sall(sgl_value) >> (63 - exponent); \
Dintp2(dresultB) = Sall(sgl_value) << (exponent - 31); \
Dintp1(dresultA) = val >> (63 - exponent); \
Dintp2(dresultB) = exponent <= 62 ? val << (exponent - 31) : 0; \
} \
Sall(sgl_value) >>= SGL_EXP_LENGTH; /* return to original */ \
}
#define Duint_setzero(dresultA,dresultB) \