diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2020-01-17 15:04:03 -0800 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2020-01-17 16:53:44 -0800 |
| commit | f45ba2bd6da0dc8000aa7ea7a3858fb51608f766 (patch) | |
| tree | 3be8113cb45459531bc5ffee5bbbb1de38d5d234 /arch/arc/kernel/process.c | |
| parent | f05523aa7a1e63bfada5e222c0a57e02dbd4fcfa (diff) | |
ARCv2: fpu: preserve userspace fpu state
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/kernel/process.c')
| -rw-r--r-- | arch/arc/kernel/process.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c index bfd4cbe74aa3..315528f04bc1 100644 --- a/arch/arc/kernel/process.c +++ b/arch/arc/kernel/process.c @@ -20,6 +20,8 @@ #include <linux/elf.h> #include <linux/tick.h> +#include <asm/fpu.h> + SYSCALL_DEFINE1(arc_settls, void *, user_tls_data_ptr) { task_thread_info(current)->thr_ptr = (unsigned int)user_tls_data_ptr; @@ -263,7 +265,7 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long usp, /* * Do necessary setup to start up a new user task */ -void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp) +void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp) { regs->sp = usp; regs->ret = pc; @@ -279,6 +281,8 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp) regs->eflags = 0; #endif + fpu_init_task(regs); + /* bogus seed values for debugging */ regs->lp_start = 0x10; regs->lp_end = 0x80; |