[PATCH 2/2] arm64: kexec: reduce calls to page_address()
From: Rongwei Wang <hidden>
Date: 2021-10-30 18:32:18
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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 <redacted> --- 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 1038494135c8..7f2530bcd42e 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)
--
2.27.0
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