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| author | Greg Kroah-Hartman | 2016-11-14 08:11:29 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2016-11-14 08:11:29 +0100 |
| commit | 8a0a8e1c42fdf656e7b729e9c468c2caa687adb7 (patch) | |
| tree | bde58e16dd5e6912deccac7e41b9a95f05187ea6 /arch/mips/include/asm/switch_to.h | |
| parent | USB: cdc-acm: use get_icount tty operation (diff) | |
| parent | Linux 4.9-rc5 (diff) | |
| download | kernel-qcow2-linux-8a0a8e1c42fdf656e7b729e9c468c2caa687adb7.tar.gz kernel-qcow2-linux-8a0a8e1c42fdf656e7b729e9c468c2caa687adb7.tar.xz kernel-qcow2-linux-8a0a8e1c42fdf656e7b729e9c468c2caa687adb7.zip | |
Merge 4.9-rc5 into usb-next
We want/need the USB fixes in here as well, for testing and merge
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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); \ |