Commit-ID: 10340ae130fb70352eae1ae8a00b7906d91bf166 Gitweb: http://git.kernel.org/tip/10340ae130fb70352eae1ae8a00b7906d91bf166 Author: Suresh Siddha <[email protected]> AuthorDate: Tue, 16 Nov 2010 13:23:51 -0800 Committer: H. Peter Anvin <[email protected]> CommitDate: Mon, 13 Dec 2010 16:13:11 -0800
x86, xsave: Use alloc_bootmem_align() instead of alloc_bootmem() Alignment of alloc_bootmem() depends on the value of L1_CACHE_SHIFT. What we need here, however, is 64 byte alignment. Use alloc_bootmem_align() and explicitly specify the alignment instead. This fixes a kernel boot crash reported by Jody when the cpu in .config is set to MPENTIUMII but the kernel is booted on a xsave-capable CPU. Reported-by: Jody Bruchon <[email protected]> Signed-off-by: Suresh Siddha <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Cc: <[email protected]> --- arch/x86/kernel/xsave.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index 9c253bd..5471285 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -394,7 +394,8 @@ static void __init setup_xstate_init(void) * 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(); _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
