Revert commit 8f8201dfed91 ("parisc: Increase thread and stack size to 32kb").
Starting with kernel 4.11 the thread and irq stacks on parisc randomly overflow
the default size of 16k. The reason why the stack usage suddenly grew was
unknown. Now the stack sizes seem to be back at their usual 8-12kb, so we can
revert the temporary workaround of commit 8f8201dfed91.
Signed-off-by: Helge Deller <deller@xxxxxx>
diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
index bc208136bbb2..88fe0aad4390 100644
--- a/arch/parisc/include/asm/thread_info.h
+++ b/arch/parisc/include/asm/thread_info.h
@@ -34,7 +34,7 @@ struct thread_info {
/* thread information allocation */
-#define THREAD_SIZE_ORDER 3 /* PA-RISC requires at least 32k stack */
+#define THREAD_SIZE_ORDER 2 /* PA-RISC requires at least 16k stack */
/* Be sure to hunt all references to this down when you change the size of
* the kernel stack */
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 0ca254085a66..5404e4086cb9 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -380,7 +380,7 @@ static inline int eirr_to_irq(unsigned long eirr)
/*
* IRQ STACK - used for irq handler
*/
-#define IRQ_STACK_SIZE (4096 << 3) /* 32k irq stack size */
+#define IRQ_STACK_SIZE (4096 << 2) /* 16k irq stack size */
union irq_stack_union {
unsigned long stack[IRQ_STACK_SIZE/sizeof(unsigned long)];
--
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