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powerpc/kprobes: Use preempt_enable() rather than the no_resched variant

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preempt_enable_no_resched() is just the same as preempt_enable() when we
are in a irqs disabled context. kprobe_handler() and the post/fault
handlers are all called with irqs disabled. As such, convert those to
just use preempt_enable().

Reported-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/72639f75fe66f931ec8c2165276ffbfb0fe1006f.1666262278.git.naveen.n.rao@linux.vnet.ibm.com
This commit is contained in:
Naveen N. Rao 2022-10-20 22:58:59 +05:30 committed by Michael Ellerman
parent 04ec5d5782
commit 266b1991a4
1 changed files with 6 additions and 6 deletions
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12
arch/powerpc/kernel/kprobes.c
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@ -369,7 +369,7 @@ int kprobe_handler(struct pt_regs *regs)
if (ret > 0) {
restore_previous_kprobe(kcb);
preempt_enable_no_resched();
preempt_enable();
return 1;
}
}
@ -382,7 +382,7 @@ int kprobe_handler(struct pt_regs *regs)
if (p->pre_handler && p->pre_handler(p, regs)) {
/* handler changed execution path, so skip ss setup */
reset_current_kprobe();
preempt_enable_no_resched();
preempt_enable();
return 1;
}
@ -395,7 +395,7 @@ int kprobe_handler(struct pt_regs *regs)
kcb->kprobe_status = KPROBE_HIT_SSDONE;
reset_current_kprobe();
preempt_enable_no_resched();
preempt_enable();
return 1;
}
}
@ -404,7 +404,7 @@ int kprobe_handler(struct pt_regs *regs)
return 1;
no_kprobe:
preempt_enable_no_resched();
preempt_enable();
return ret;
}
NOKPROBE_SYMBOL(kprobe_handler);
@ -490,7 +490,7 @@ int kprobe_post_handler(struct pt_regs *regs)
}
reset_current_kprobe();
out:
preempt_enable_no_resched();
preempt_enable();
/*
* if somebody else is singlestepping across a probe point, msr
@ -529,7 +529,7 @@ int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
restore_previous_kprobe(kcb);
else
reset_current_kprobe();
preempt_enable_no_resched();
preempt_enable();
break;
case KPROBE_HIT_ACTIVE:
case KPROBE_HIT_SSDONE: