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Message-ID: <1382520685-11609-6-git-send-email-tiejun.chen@windriver.com> Date: Wed, 23 Oct 2013 17:31:25 +0800 From: Tiejun Chen <tiejun.chen@...driver.com> To: <scottwood@...escale.com> CC: <benh@...nel.crashing.org>, <linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org> Subject: [v6][PATCH 5/5] powerpc/book3e/kgdb: Fix a single stgep case of lazy IRQ In lazy EE magic, we may have a lazy interrupt occured while entering kgdb, but we really don't want to replay that interrupt for kgdb, so we have to clear the PACA_IRQ_HARD_DIS force to make sure we can exit directly from this debug exception. Signed-off-by: Tiejun Chen <tiejun.chen@...driver.com> --- arch/powerpc/kernel/kgdb.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c index 447c14b..9872f58 100644 --- a/arch/powerpc/kernel/kgdb.c +++ b/arch/powerpc/kernel/kgdb.c @@ -185,6 +185,14 @@ static int kgdb_singlestep(struct pt_regs *regs) /* Restore current_thread_info lastly. */ memcpy(exception_thread_info, backup_current_thread_info, sizeof *thread_info); +#ifdef CONFIG_PPC64 + /* + * Clear the PACA_IRQ_HARD_DIS from the pending mask + * since we are about to exit this directly from debug + * exception without any replay interrupt in lazy EE case. + */ + local_paca->irq_happened &= ~PACA_IRQ_HARD_DIS; +#endif return 1; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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