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[5.10,077/102] parisc: Bump 64-bit IRQ stack size to 64 KB

Message ID 20210305120907.066355981@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH March 5, 2021, 12:21 p.m. UTC 
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(+)
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Patch

diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index e76c86619949..60f5829d476f 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)];