linux-kernel - [PATCH] fork: Use THREAD_SIZE

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Date: Mon, 11 Mar 2024 14:44:04 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>
Cc: linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] fork: Use THREAD_SIZE_ORDER

Use the existing THREAD_SIZE_ORDER definition instead of calculating it
from THREAD_SIZE and PAGE_SIZE.

Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
 kernel/fork.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 0d944e92a43ffa13..e79fdfe1f0bf4953 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -252,9 +252,9 @@ static int memcg_charge_kernel_stack(struct vm_struct *vm)
 	int ret;
 	int nr_charged = 0;
 
-	BUG_ON(vm->nr_pages != THREAD_SIZE / PAGE_SIZE);
+	BUG_ON(vm->nr_pages != THREAD_SIZE_ORDER);
 
-	for (i = 0; i < THREAD_SIZE / PAGE_SIZE; i++) {
+	for (i = 0; i < THREAD_SIZE_ORDER; i++) {
 		ret = memcg_kmem_charge_page(vm->pages[i], GFP_KERNEL, 0);
 		if (ret)
 			goto err;
@@ -535,7 +535,7 @@ static void account_kernel_stack(struct task_struct *tsk, int account)
 		struct vm_struct *vm = task_stack_vm_area(tsk);
 		int i;
 
-		for (i = 0; i < THREAD_SIZE / PAGE_SIZE; i++)
+		for (i = 0; i < THREAD_SIZE_ORDER; i++)
 			mod_lruvec_page_state(vm->pages[i], NR_KERNEL_STACK_KB,
 					      account * (PAGE_SIZE / 1024));
 	} else {
@@ -556,7 +556,7 @@ void exit_task_stack_account(struct task_struct *tsk)
 		int i;
 
 		vm = task_stack_vm_area(tsk);
-		for (i = 0; i < THREAD_SIZE / PAGE_SIZE; i++)
+		for (i = 0; i < THREAD_SIZE_ORDER; i++)
 			memcg_kmem_uncharge_page(vm->pages[i], 0);
 	}
 }
-- 
2.34.1