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Groups > linux.kernel > #1664814

[PATCH 1/3] printk/console: Remove superfluous setting of has_preferred state value

From Petr Mladek <pmladek@suse.com>
Newsgroups linux.kernel
Subject [PATCH 1/3] printk/console: Remove superfluous setting of has_preferred state value
Date 2017-06-13 15:00 +0200
Message-ID <tRTAl-859-3@gated-at.bofh.it> (permalink)
References <tRTAl-859-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

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It is superfluous to set "has_preferred" when the really preferred
console is enabled. The variable "i" is index of an array. Therefore
"has_preferred" is set only when preferred_console is >= 0. But then
it was already true because of the above code:

	if (!has_preferred || bcon || !console_drivers)
		has_preferred = preferred_console >= 0;

This line was added by the commit ab4af03a4054bd78bc ("[PATCH] CON_CONSDEV
bit not set correctly on last console"). It was kind of logic to store
the really used index there. But this commit actually caused that
"preferred_console" started to be used only as a boolean. This was
discovered and corrected by the commit b077bafa2f3848ddfcef ("printk:
fix name/type/scope of preferred_console var").

Signed-off-by: Petr Mladek <pmladek@suse.com>
---
 kernel/printk/printk.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index a1db38abac5b..8ebc480fdbc6 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2489,10 +2489,8 @@ void register_console(struct console *newcon)
 		}
 
 		newcon->flags |= CON_ENABLED;
-		if (i == preferred_console) {
+		if (i == preferred_console)
 			newcon->flags |= CON_CONSDEV;
-			has_preferred = true;
-		}
 		break;
 	}
 
-- 
1.8.5.6

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[PATCH 1/3] printk/console: Remove superfluous setting of has_preferred state value Petr Mladek <pmladek@suse.com> - 2017-06-13 15:00 +0200
  Re: [PATCH 1/3] printk/console: Remove superfluous setting of  has_preferred state value Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2017-06-14 09:50 +0200

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