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authorJohn David Anglin <dave.anglin@bell.net>2017-11-13 19:35:33 -0500
committerHelge Deller <deller@gmx.de>2017-12-17 21:06:25 +0100
commitda57c5414f49ef9e4bcb9ae0bbafd1d650b31411 (patch)
tree281196ba075cfe03c9a1b24750f82ebcae42968e /arch/parisc/include
parent9352aeada4d8d8753fc0e414fbfe8fdfcb68a12c (diff)
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 <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/include')
-rw-r--r--arch/parisc/include/asm/thread_info.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
index c980a02a52bc..598c8d60fa5e 100644
--- 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)