Messages in this thread Patch in this message | | | Subject | [PATCH 01/11] x86, fpu: kill LWP support | From | Dave Hansen <> | Date | Thu, 27 Aug 2015 10:11:02 -0700 |
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From: Dave Hansen <dave.hansen@linux.intel.com>
LightWeight Profiling was evidently an AMD profiling feature that we never got around to implementing. Remove the references to it.
This patch is a *bit* worrisome becuase it will implicitly cause 'struct xregs_state' to shrink. This effectively removes some unused padding that we had in there. It might expose other bugs.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: x86@kernel.org Cc: Borislav Petkov <bp@alien8.de> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: linux-kernel@vger.kernel.org ---
b/arch/x86/include/asm/fpu/types.h | 6 ------ 1 file changed, 6 deletions(-)
diff -puN arch/x86/include/asm/fpu/types.h~axe-lwp arch/x86/include/asm/fpu/types.h --- a/arch/x86/include/asm/fpu/types.h~axe-lwp 2015-08-27 10:08:01.195617135 -0700 +++ b/arch/x86/include/asm/fpu/types.h 2015-08-27 10:08:01.198617272 -0700 @@ -132,11 +132,6 @@ struct ymmh_struct { u8 ymmh_space[256]; }; -/* We don't support LWP yet: */ -struct lwp_struct { - u8 reserved[128]; -}; - /* Intel MPX support: */ struct bndreg { u64 lower_bound; @@ -161,7 +156,6 @@ struct xstate_header { /* New processor state extensions should be added here: */ #define XSTATE_RESERVE (sizeof(struct ymmh_struct) + \ - sizeof(struct lwp_struct) + \ sizeof(struct mpx_struct) ) /* * This is our most modern FPU state format, as saved by the XSAVE _
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