From: John David Anglin <dave.anglin@bell.net>
Date: Thu, 28 Jan 2021 23:12:30 +0000 (-0500)
Subject: parisc: Bump 64-bit IRQ stack size to 64 KB
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=31680c1d1595a59e17c14ec036b192a95f8e5f4a;p=linux.git

parisc: Bump 64-bit IRQ stack size to 64 KB

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>
---

diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 49cd6d2caefb7..1dfb439b06928 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -373,7 +373,11 @@ 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)];