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arm64: kexec: reduce calls to page_address()

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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: Rongwei Wang <rongwei.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20211125170600.1608-3-rongwei.wang@linux.alibaba.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Rongwei Wang 2021-11-26 01:06:00 +08:00 committed by Catalin Marinas
parent fde046e07d
commit 7afccde389
1 changed files with 4 additions and 2 deletions
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6
arch/arm64/kernel/machine_kexec.c
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@ -104,13 +104,15 @@ static void *kexec_page_alloc(void *arg)
{ {
struct kimage *kimage = (struct kimage *)arg; struct kimage *kimage = (struct kimage *)arg;
struct page *page = kimage_alloc_control_pages(kimage, 0); struct page *page = kimage_alloc_control_pages(kimage, 0);
void *vaddr = NULL;
if (!page) if (!page)
return NULL; 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) int machine_kexec_post_load(struct kimage *kimage)