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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2022-02-17 13:24:06 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-02-23 00:25:02 +0300 |
| commit | 0ce055f85335e48bc571114d61a70ae217039362 (patch) | |
| tree | 7fba237e2087750e6ea54b755c0fabdfaecea885 | |
| parent | e540bf3162e822d7a1f07e69e3bb1b4f925ca368 (diff) | |
| download | linux-0ce055f85335e48bc571114d61a70ae217039362.tar.xz | |
fork: Use IS_ENABLED() in account_kernel_stack()
Not strickly needed but checking CONFIG_VMAP_STACK instead of
task_stack_vm_area()' result allows the compiler the remove the else
path in the CONFIG_VMAP_STACK case where the pointer can't be NULL.
Check for CONFIG_VMAP_STACK in order to use the proper path.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-9-bigeasy@linutronix.de
| -rw-r--r-- | kernel/fork.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 177bc64078cd..1279b57c4ad9 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -485,16 +485,16 @@ void vm_area_free(struct vm_area_struct *vma) static void account_kernel_stack(struct task_struct *tsk, int account) { - void *stack = task_stack_page(tsk); - struct vm_struct *vm = task_stack_vm_area(tsk); - - if (vm) { + if (IS_ENABLED(CONFIG_VMAP_STACK)) { + struct vm_struct *vm = task_stack_vm_area(tsk); int i; for (i = 0; i < THREAD_SIZE / PAGE_SIZE; i++) mod_lruvec_page_state(vm->pages[i], NR_KERNEL_STACK_KB, account * (PAGE_SIZE / 1024)); } else { + void *stack = task_stack_page(tsk); + /* All stack pages are in the same node. */ mod_lruvec_kmem_state(stack, NR_KERNEL_STACK_KB, account * (THREAD_SIZE / 1024)); |