linux-kernel - [PATCH] riscv: use 16KB kernel stack on 64-bit

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Message-ID: <mvmeepoddt1.fsf@suse.de>
Date:   Mon, 06 Jul 2020 14:32:26 +0200
From:   Andreas Schwab <schwab@...e.de>
To:     linux-riscv@...ts.infradead.org
CC:     linux-kernel@...r.kernel.org
Subject: [PATCH] riscv: use 16KB kernel stack on 64-bit

With the current 8KB stack size there are frequent overflows in a 64-bit
configuration.

Signed-off-by: Andreas Schwab <schwab@...e.de>
---
 arch/riscv/include/asm/thread_info.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h
index 1dd12a0cbb2b..464a2bbc97ea 100644
--- a/arch/riscv/include/asm/thread_info.h
+++ b/arch/riscv/include/asm/thread_info.h
@@ -12,7 +12,11 @@
 #include <linux/const.h>
 
 /* thread information allocation */
+#ifdef CONFIG_64BIT
+#define THREAD_SIZE_ORDER	(2)
+#else
 #define THREAD_SIZE_ORDER	(1)
+#endif
 #define THREAD_SIZE		(PAGE_SIZE << THREAD_SIZE_ORDER)
 
 #ifndef __ASSEMBLY__
-- 
2.26.2


-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
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