diff options
| author | Thomas Gleixner <[email protected]> | 2021-10-21 15:55:14 -0700 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2021-10-26 10:18:09 +0200 |
| commit | 9e798e9aa14c45fb94e47b30bf6347b369ce9df7 (patch) | |
| tree | 7fb104bf6f129909ec1d659032ed5038680b1951 /net/lapb/lapb_timer.c | |
| parent | 53599b4d54b9b8dda1d537a558946869d2acbddc (diff) | |
x86/fpu: Prepare fpu_clone() for dynamically enabled features
The default portion of the parent's FPU state is saved in a child task.
With dynamic features enabled, the non-default portion is not saved in a
child's fpstate because these register states are defined to be
caller-saved. The new task's fpstate is therefore the default buffer.
Fork inherits the permission of the parent.
Also, do not use memcpy() when TIF_NEED_FPU_LOAD is set because it is
invalid when the parent has dynamic features.
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Chang S. Bae <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions