2020-10-12 12:52:06 +00:00
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From e87e30a754eaaeae393934e4d25104a8739a4b20 Mon Sep 17 00:00:00 2001
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Message-Id: <e87e30a754eaaeae393934e4d25104a8739a4b20.1601675151.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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2018-08-27 14:32:32 +00:00
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Wed, 21 Sep 2011 19:57:12 +0200
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2020-09-04 20:10:21 +00:00
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Subject: [PATCH 032/333] signal: Revert ptrace preempt magic
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2020-10-12 12:52:06 +00:00
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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2018-08-27 14:32:32 +00:00
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Upstream commit '53da1d9456fe7f8 fix ptrace slowness' is nothing more
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than a bandaid around the ptrace design trainwreck. It's not a
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correctness issue, it's merily a cosmetic bandaid.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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2019-04-08 23:49:20 +00:00
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kernel/signal.c | 8 --------
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2018-08-27 14:32:32 +00:00
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1 file changed, 8 deletions(-)
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2019-04-08 23:49:20 +00:00
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diff --git a/kernel/signal.c b/kernel/signal.c
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2020-06-22 13:14:16 +00:00
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index 6a5692118139..f810797e48cb 100644
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2018-08-27 14:32:32 +00:00
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--- a/kernel/signal.c
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+++ b/kernel/signal.c
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2020-04-21 20:13:52 +00:00
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@@ -2108,15 +2108,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, siginfo_t *info)
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2018-08-27 14:32:32 +00:00
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if (gstop_done && ptrace_reparented(current))
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do_notify_parent_cldstop(current, false, why);
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- /*
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- * Don't want to allow preemption here, because
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- * sys_ptrace() needs this task to be inactive.
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- *
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- * XXX: implement read_unlock_no_resched().
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- */
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- preempt_disable();
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read_unlock(&tasklist_lock);
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- preempt_enable_no_resched();
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freezable_schedule();
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} else {
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/*
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2020-01-03 23:36:11 +00:00
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--
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2020-06-22 13:14:16 +00:00
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2.17.1
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2020-01-03 23:36:11 +00:00
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