parisc: Reduce thread stack to 16 kb

In testing, I found that the thread stack can be 16 kB when using an irq stack. Without it, the thread stack needs to be 32 kB. Currently, the irq stack is 32 kB. While it probably could be 16 kB, I would prefer to leave it as is for safety. Signed-off-by: John David Anglin <[email protected]> Signed-off-by: Helge Deller <[email protected]>
berg · Dec 17, 2017 · da57c54 · da57c54
1 parent 9352aea
commit da57c54
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
@@ -35,7 +35,12 @@ struct thread_info {
 
 /* thread information allocation */
 
+#ifdef CONFIG_IRQSTACKS
+#define THREAD_SIZE_ORDER	2 /* PA-RISC requires at least 16k stack */
+#else
 #define THREAD_SIZE_ORDER	3 /* PA-RISC requires at least 32k stack */
+#endif
+
 /* 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)