diff options
| author | David S. Miller <davem@davemloft.net> | 2016-11-15 10:54:36 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-11-15 10:54:36 -0500 |
| commit | bb598c1b8c9bf56981927dcb8c0dc34b8ff95342 (patch) | |
| tree | 69fe6d3bcdbf0acb76e42b144d8af5a0234ccdcb /arch/mips/include/asm/switch_to.h | |
| parent | eb2ca35f1814dad3ca547261eedfbbd0d65a0efc (diff) | |
| parent | e76d21c40bd6c67fd4e2c1540d77e113df962b4d (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Several cases of bug fixes in 'net' overlapping other changes in
'net-next-.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/mips/include/asm/switch_to.h')
| -rw-r--r-- | arch/mips/include/asm/switch_to.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/mips/include/asm/switch_to.h b/arch/mips/include/asm/switch_to.h index ebb5c0f2f90d..c0ae27971e31 100644 --- a/arch/mips/include/asm/switch_to.h +++ b/arch/mips/include/asm/switch_to.h @@ -76,6 +76,22 @@ do { if (cpu_has_rw_llb) { \ } while (0) /* + * Check FCSR for any unmasked exceptions pending set with `ptrace', + * clear them and send a signal. + */ +#define __sanitize_fcr31(next) \ +do { \ + unsigned long fcr31 = mask_fcr31_x(next->thread.fpu.fcr31); \ + void __user *pc; \ + \ + if (unlikely(fcr31)) { \ + pc = (void __user *)task_pt_regs(next)->cp0_epc; \ + next->thread.fpu.fcr31 &= ~fcr31; \ + force_fcr31_sig(fcr31, pc, next); \ + } \ +} while (0) + +/* * For newly created kernel threads switch_to() will return to * ret_from_kernel_thread, newly created user threads to ret_from_fork. * That is, everything following resume() will be skipped for new threads. @@ -85,6 +101,8 @@ do { if (cpu_has_rw_llb) { \ do { \ __mips_mt_fpaff_switch_to(prev); \ lose_fpu_inatomic(1, prev); \ + if (tsk_used_math(next)) \ + __sanitize_fcr31(next); \ if (cpu_has_dsp) { \ __save_dsp(prev); \ __restore_dsp(next); \ |