[S390] Fix alignment of initial kernel stack.

We need an alignment of 16384 bytes for the initial kernel stack if
the kernel is configured for 16384 bytes stacks but the linker script
currently guarantees only an alignment of 8192 bytes.

So fix this and simply use THREAD_SIZE as alignment value which will
always do the right thing.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/kernel/init_task.c b/arch/s390/kernel/init_task.c
index 7ad003969251f159cb7f5d6ab0cfaac62c9eb113..e807168436194c81fe0f4892f9be5a7e4bed685b 100644 (file)
--- a/arch/s390/kernel/init_task.c
+++ b/arch/s390/kernel/init_task.c
@@ -26,7 +26,7 @@ EXPORT_SYMBOL(init_mm);
 /*
  * Initial thread structure.
  *
- * We need to make sure that this is 8192-byte aligned due to the
+ * We need to make sure that this is THREAD_SIZE aligned due to the
  * way process stacks are handled. This is done by having a special
  * "init_task" linker map entry..
  */

diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 607bd67a18ce782f21051e4e306f8feced721719..d796d05c9c01ac1be6779682a730485d73502bd2 100644 (file)
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -2,6 +2,7 @@
  * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
  */
 
+#include <asm/thread_info.h>
 #include <asm/page.h>
 #include <asm-generic/vmlinux.lds.h>
 
@@ -86,7 +87,7 @@ SECTIONS
        }
        _edata = .;             /* End of data section */
 
-       . = ALIGN(2 * PAGE_SIZE);       /* init_task */
+       . = ALIGN(THREAD_SIZE); /* init_task */
        .data.init_task : {
                *(.data.init_task)
        }