linux-kernel - [PATCH AUTOSEL 5.8 049/132] printk: reduce LOG_BUF

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Date:   Mon, 26 Oct 2020 19:50:41 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     John Ogness <john.ogness@...utronix.de>,
        kernel test robot <lkp@...el.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Petr Mladek <pmladek@...e.com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.8 049/132] printk: reduce LOG_BUF_SHIFT range for H8300

From: John Ogness <john.ogness@...utronix.de>

[ Upstream commit 550c10d28d21bd82a8bb48debbb27e6ed53262f6 ]

The .bss section for the h8300 is relatively small. A value of
CONFIG_LOG_BUF_SHIFT that is larger than 19 will create a static
printk ringbuffer that is too large. Limit the range appropriately
for the H8300.

Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: John Ogness <john.ogness@...utronix.de>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Signed-off-by: Petr Mladek <pmladek@...e.com>
Link: https://lore.kernel.org/r/20200812073122.25412-1-john.ogness@linutronix.de
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 init/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/init/Kconfig b/init/Kconfig
index 0498af567f706..5e68928c131b8 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -654,7 +654,8 @@ config IKHEADERS
 
 config LOG_BUF_SHIFT
 	int "Kernel log buffer size (16 => 64KB, 17 => 128KB)"
-	range 12 25
+	range 12 25 if !H8300
+	range 12 19 if H8300
 	default 17
 	depends on PRINTK
 	help
-- 
2.25.1