diff options
Diffstat (limited to 'arch/arm/kernel/sleep.S')
| -rw-r--r-- | arch/arm/kernel/sleep.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/kernel/sleep.S b/arch/arm/kernel/sleep.S index 43077e11dafd..803b51e5cba0 100644 --- a/arch/arm/kernel/sleep.S +++ b/arch/arm/kernel/sleep.S @@ -67,6 +67,14 @@ ENTRY(__cpu_suspend) ldr r4, =cpu_suspend_size #endif mov r5, sp @ current virtual SP +#ifdef CONFIG_VMAP_STACK + @ Run the suspend code from the overflow stack so we don't have to rely + @ on vmalloc-to-phys conversions anywhere in the arch suspend code. + @ The original SP value captured in R5 will be restored on the way out. + mov_l r6, overflow_stack_ptr @ Base pointer + mrc p15, 0, r7, c13, c0, 4 @ Get per-CPU offset + ldr sp, [r6, r7] @ Address of this CPU's overflow stack +#endif add r4, r4, #12 @ Space for pgd, virt sp, phys resume fn sub sp, sp, r4 @ allocate CPU state on stack ldr r3, =sleep_save_sp |