AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

arm64: Avoid unnecessary clear_user_page() indirection

Browse Source 
Since clear_user_page() calls clear_page() directly, avoid the
unnecessary indirection.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
This commit is contained in:
Catalin Marinas 2020-06-21 11:41:27 +01:00
parent 2563776b41
commit 738c8780fc
2 changed files with 1 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm64/include/asm/page.h
View File

@ -18,7 +18,6 @@
struct page;
struct vm_area_struct;
extern void __cpu_clear_user_page(void *p, unsigned long user);
extern void copy_page(void *to, const void *from);
extern void clear_page(void *to);
@ -33,7 +32,7 @@ void copy_highpage(struct page *to, struct page *from);
alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
#define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
typedef struct page *pgtable_t;

6
arch/arm64/mm/copypage.c
View File

@ -35,9 +35,3 @@ void copy_user_highpage(struct page *to, struct page *from,
flush_dcache_page(to);
}
EXPORT_SYMBOL_GPL(copy_user_highpage);
void __cpu_clear_user_page(void *kaddr, unsigned long vaddr)
{
clear_page(kaddr);
}
EXPORT_SYMBOL_GPL(__cpu_clear_user_page);