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riscv: use 16KB kernel stack on 64-bit

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commit 0cac21b02ba5f3095fd2dcc77c26a25a0b2432ed upstream.

With the current 8KB stack size there are frequent overflows in a 64-bit
configuration.  We may split IRQ stacks off in the future, but this fixes a
number of issues right now.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Anup Patel <anup@brainfault.org>
[Palmer: mention irqstack in the commit text]
Fixes: 7db91e57a0 ("RISC-V: Task implementation")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andreas Schwab 2020-07-06 14:32:26 +02:00 committed by Greg Kroah-Hartman
parent eefcd11cc9
commit e558fc637c
1 changed files with 4 additions and 0 deletions
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4
arch/riscv/include/asm/thread_info.h
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@ -20,7 +20,11 @@
#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__