[patch 2/2] xsave: use alloc_bootmem_align() instead of alloc_bootmem()

[Suresh Siddha <suresh.b.siddha@intel.com>]

[-- Attachment #1: xsave_use_alloc_bootmem_align.patch --]
[-- Type: text/plain, Size: 1030 bytes --]

Alignment of alloc_bootmem() depends on the value of L1_CACHE_SHIFT. What
we need here is 64byte alignment. Use alloc_bootmem_align() instead.

This fixes a kernel boot crash reported by Jody when the cpu in .config
is set to MPENTIUMII

Reported-by: Jody Bruchon <jody@nctritech.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
---
 arch/x86/kernel/xsave.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: tree/arch/x86/kernel/xsave.c
===================================================================
--- tree.orig/arch/x86/kernel/xsave.c
+++ tree/arch/x86/kernel/xsave.c
@@ -394,7 +394,8 @@ static void __init setup_xstate_init(voi
 	 * Setup init_xstate_buf to represent the init state of
 	 * all the features managed by the xsave
 	 */
-	init_xstate_buf = alloc_bootmem(xstate_size);
+	init_xstate_buf = alloc_bootmem_align(xstate_size,
+					      __alignof__(struct xsave_struct));
 	init_xstate_buf->i387.mxcsr = MXCSR_DEFAULT;
 
 	clts();