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-rw-r--r--arch/x86_64/kernel/process.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index de10cb8a2c97..5e95b257ee26 100644
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -615,6 +615,9 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
615 prev->gsindex = gsindex; 615 prev->gsindex = gsindex;
616 } 616 }
617 617
618 /* Must be after DS reload */
619 unlazy_fpu(prev_p);
620
618 /* 621 /*
619 * Switch the PDA and FPU contexts. 622 * Switch the PDA and FPU contexts.
620 */ 623 */
@@ -622,10 +625,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
622 write_pda(oldrsp, next->userrsp); 625 write_pda(oldrsp, next->userrsp);
623 write_pda(pcurrent, next_p); 626 write_pda(pcurrent, next_p);
624 627
625 /* This must be here to ensure both math_state_restore() and
626 kernel_fpu_begin() work consistently.
627 And the AMD workaround requires it to be after DS reload. */
628 unlazy_fpu(prev_p);
629 write_pda(kernelstack, 628 write_pda(kernelstack,
630 (unsigned long)task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET); 629 (unsigned long)task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET);
631#ifdef CONFIG_CC_STACKPROTECTOR 630#ifdef CONFIG_CC_STACKPROTECTOR