* [PATCH AUTOSEL 5.4 35/40] parisc: Bump 64-bit IRQ stack size to 64 KB
[not found] <20210224125340.483162-1-sashal@kernel.org>
@ 2021-02-24 12:53 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2021-02-24 12:53 UTC (permalink / raw)
To: linux-kernel, stable
Cc: John David Anglin, Helge Deller, Sasha Levin, linux-parisc
From: John David Anglin <dave.anglin@bell.net>
[ Upstream commit 31680c1d1595a59e17c14ec036b192a95f8e5f4a ]
Bump 64-bit IRQ stack size to 64 KB.
I had a kernel IRQ stack overflow on the mx3210 debian buildd machine. This patch increases the
64-bit IRQ stack size to 64 KB. The 64-bit stack size needs to be larger than the 32-bit stack
size since registers are twice as big.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/parisc/kernel/irq.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index e5fcfb70cc7c0..4d54aa70ea5f3 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -376,7 +376,11 @@ static inline int eirr_to_irq(unsigned long eirr)
/*
* IRQ STACK - used for irq handler
*/
+#ifdef CONFIG_64BIT
+#define IRQ_STACK_SIZE (4096 << 4) /* 64k irq stack size */
+#else
#define IRQ_STACK_SIZE (4096 << 3) /* 32k irq stack size */
+#endif
union irq_stack_union {
unsigned long stack[IRQ_STACK_SIZE/sizeof(unsigned long)];
--
2.27.0
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2021-02-24 12:53 ` [PATCH AUTOSEL 5.4 35/40] parisc: Bump 64-bit IRQ stack size to 64 KB Sasha Levin
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