From 7afccde389dcfaca793a0d909f8cb7412e1d1dbe Mon Sep 17 00:00:00 2001 From: Rongwei Wang Date: Fri, 26 Nov 2021 01:06:00 +0800 Subject: [PATCH] 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: Rongwei Wang Link: https://lore.kernel.org/r/20211125170600.1608-3-rongwei.wang@linux.alibaba.com Signed-off-by: Catalin Marinas --- arch/arm64/kernel/machine_kexec.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 1038494..7f2530b 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -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) -- 2.7.4