linux-kernel - [PATCH v2 5/5] x86/mce: rename kill_it as kill_current

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Date:   Fri, 27 Nov 2020 16:18:19 +0000
From:   Gabriele Paoloni <gabriele.paoloni@...el.com>
To:     tony.luck@...el.com, bp@...en8.de, tglx@...utronix.de,
        mingo@...hat.com, x86@...nel.org, hpa@...or.com,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     gabriele.paoloni@...el.com, linux-safety@...ts.elisa.tech
Subject: [PATCH v2 5/5] x86/mce: rename kill_it as kill_current_task

Currently if an MCE happens in user-mode or while the kernel
is copying data from user space, 'kill_it' is used to check
if we can recover the execution of the interrupted task or
not; the flag name however is not much meaningful, hence
rename it to match its goal.

Signed-off-by: Gabriele Paoloni <gabriele.paoloni@...el.com>
---
 arch/x86/kernel/cpu/mce/core.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 802302c54762..740a4fcc1e90 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1320,10 +1320,10 @@ noinstr void do_machine_check(struct pt_regs *regs)
 	int no_way_out = 0;
 
 	/*
-	 * If kill_it gets set, there might be a way to recover from this
+	 * If kill_current_task is not set, there might be a way to recover from this
 	 * error.
 	 */
-	int kill_it = 0;
+	int kill_current_task = 0;
 
 	/*
 	 * MCEs are always local on AMD. Same is determined by MCG_STATUS_LMCES
@@ -1350,7 +1350,7 @@ noinstr void do_machine_check(struct pt_regs *regs)
 	 * severity is MCE_AR_SEVERITY we have other options.
 	 */
 	if (!(m.mcgstatus & MCG_STATUS_RIPV))
-		kill_it = (cfg->tolerant == 3) ? 0 : 1;
+		kill_current_task = (cfg->tolerant == 3) ? 0 : 1;
 	/*
 	 * Check if this MCE is signaled to only this logical processor,
 	 * on Intel, Zhaoxin only.
@@ -1408,7 +1408,7 @@ noinstr void do_machine_check(struct pt_regs *regs)
 		}
 	}
 
-	if (worst != MCE_AR_SEVERITY && !kill_it)
+	if (worst != MCE_AR_SEVERITY && !kill_current_task)
 		goto out;
 
 	/* Fault was in user mode and we need to take some action */
@@ -1416,7 +1416,7 @@ noinstr void do_machine_check(struct pt_regs *regs)
 		/* If this triggers there is no way to recover. Die hard. */
 		BUG_ON(!on_thread_stack() || !user_mode(regs));
 
-		queue_task_work(&m, kill_it);
+		queue_task_work(&m, kill_current_task);
 
 	} else {
 		/*
@@ -1434,7 +1434,7 @@ noinstr void do_machine_check(struct pt_regs *regs)
 		}
 
 		if (m.kflags & MCE_IN_KERNEL_COPYIN)
-			queue_task_work(&m, kill_it);
+			queue_task_work(&m, kill_current_task);
 	}
 out:
 	mce_wrmsrl(MSR_IA32_MCG_STATUS, 0);
-- 
2.20.1

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