diff options
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/common.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index 7bc105f47d21..51beb8d29123 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -25,12 +25,13 @@ #include <linux/uprobes.h> #include <linux/livepatch.h> #include <linux/syscalls.h> +#include <linux/uaccess.h> #include <asm/desc.h> #include <asm/traps.h> #include <asm/vdso.h> -#include <linux/uaccess.h> #include <asm/cpufeature.h> +#include <asm/fpu/api.h> #define CREATE_TRACE_POINTS #include <trace/events/syscalls.h> @@ -196,6 +197,13 @@ __visible inline void prepare_exit_to_usermode(struct pt_regs *regs) if (unlikely(cached_flags & EXIT_TO_USERMODE_LOOP_FLAGS)) exit_to_usermode_loop(regs, cached_flags); + /* Reload ti->flags; we may have rescheduled above. */ + cached_flags = READ_ONCE(ti->flags); + + fpregs_assert_state_consistent(); + if (unlikely(cached_flags & _TIF_NEED_FPU_LOAD)) + switch_fpu_return(); + #ifdef CONFIG_COMPAT /* * Compat syscalls set TS_COMPAT. Make sure we clear it before |