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Diffstat (limited to 'arch/x86/kernel/i387.c')
-rw-r--r--arch/x86/kernel/i387.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index e0ed59f5c19f..45723f1fe198 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -552,18 +552,17 @@ static int restore_i387_xsave(void __user *buf)
552 (struct i387_fxsave_struct __user *) &fx_user->_fxsr_env[0]; 552 (struct i387_fxsave_struct __user *) &fx_user->_fxsr_env[0];
553 struct xsave_hdr_struct *xsave_hdr = 553 struct xsave_hdr_struct *xsave_hdr =
554 &current->thread.xstate->xsave.xsave_hdr; 554 &current->thread.xstate->xsave.xsave_hdr;
555 unsigned int lmask, hmask; 555 u64 mask;
556 int err; 556 int err;
557 557
558 if (check_for_xstate(fx, buf, &fx_sw_user)) 558 if (check_for_xstate(fx, buf, &fx_sw_user))
559 goto fx_only; 559 goto fx_only;
560 560
561 lmask = fx_sw_user.xstate_bv; 561 mask = fx_sw_user.xstate_bv;
562 hmask = fx_sw_user.xstate_bv >> 32;
563 562
564 err = restore_i387_fxsave(buf, fx_sw_user.xstate_size); 563 err = restore_i387_fxsave(buf, fx_sw_user.xstate_size);
565 564
566 xsave_hdr->xstate_bv &= (pcntxt_lmask | (((u64) pcntxt_hmask) << 32)); 565 xsave_hdr->xstate_bv &= pcntxt_mask;
567 /* 566 /*
568 * These bits must be zero. 567 * These bits must be zero.
569 */ 568 */
@@ -573,9 +572,8 @@ static int restore_i387_xsave(void __user *buf)
573 * Init the state that is not present in the memory layout 572 * Init the state that is not present in the memory layout
574 * and enabled by the OS. 573 * and enabled by the OS.
575 */ 574 */
576 lmask = ~(pcntxt_lmask & ~lmask); 575 mask = ~(pcntxt_mask & ~mask);
577 hmask = ~(pcntxt_hmask & ~hmask); 576 xsave_hdr->xstate_bv &= mask;
578 xsave_hdr->xstate_bv &= (lmask | (((u64) hmask) << 32));
579 577
580 return err; 578 return err;
581fx_only: 579fx_only: