Commit 7afccde3 authored by Rongwei Wang's avatar Rongwei Wang Committed by Catalin Marinas
Browse files

arm64: kexec: reduce calls to page_address() 



In kexec_page_alloc(), page_address() is called twice.
This patch add a new variable to help to reduce calls
to page_address().

Signed-off-by: default avatarRongwei Wang <rongwei.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20211125170600.1608-3-rongwei.wang@linux.alibaba.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent fde046e0

arch/arm64/kernel/machine_kexec.c

+4 −2
Original line number Diff line number Diff line
@@ -104,13 +104,15 @@ static void *kexec_page_alloc(void *arg) 
{

	struct kimage *kimage = (struct kimage *)arg;

	struct page *page = kimage_alloc_control_pages(kimage, 0);

	void *vaddr = NULL;



	if (!page)

		return NULL;



	memset(page_address(page), 0, PAGE_SIZE);

	vaddr = page_address(page);

	memset(vaddr, 0, PAGE_SIZE);



	return page_address(page);

	return vaddr;

}



int machine_kexec_post_load(struct kimage *kimage)