diff options
Diffstat (limited to 'arch/mn10300/Kconfig')
| -rw-r--r-- | arch/mn10300/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig index 7bd920b1c06f..a1f334ce0a36 100644 --- a/arch/mn10300/Kconfig +++ b/arch/mn10300/Kconfig @@ -140,6 +140,21 @@ config FPU default y depends on MN10300_PROC_MN103E010 +config LAZY_SAVE_FPU + bool "Save FPU state lazily" + default y + depends on FPU && !SMP + help + Enable this to be lazy in the saving of the FPU state to the owning + task's thread struct. This is useful if most tasks on the system + don't use the FPU as only those tasks that use it will pass it + between them, and the state needn't be saved for a task that isn't + using it. + + This can't be so easily used on SMP as the process that owns the FPU + state on a CPU may be currently running on another CPU, so for the + moment, it is disabled. + source "arch/mn10300/mm/Kconfig.cache" config MN10300_TLB_USE_PIDR |