From 49e302be73f1b8de45765f3f66878f3b6c659b01 Mon Sep 17 00:00:00 2001 From: Yunsheng Lin Date: Mon, 28 Oct 2024 19:53:40 +0800 Subject: xtensa: remove the get_order() implementation As the get_order() implemented by xtensa supporting 'nsau' instruction seems be the same as the generic implementation in include/asm-generic/getorder.h when size is not a constant value as the generic implementation calling the fls*() is also utilizing the 'nsau' instruction for xtensa. So remove the get_order() implemented by xtensa, as using the generic implementation may enable the compiler to do the computing when size is a constant value instead of runtime computing and enable the using of get_order() in BUILD_BUG_ON() macro in next patch. CC: Andrew Morton CC: Linux-MM Signed-off-by: Yunsheng Lin Acked-by: Max Filippov Reviewed-by: Alexander Duyck Link: https://patch.msgid.link/20241028115343.3405838-6-linyunsheng@huawei.com Signed-off-by: Jakub Kicinski --- arch/xtensa/include/asm/page.h | 18 ------------------ 1 file changed, 18 deletions(-) (limited to 'arch') diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h index 4db56ef052d2..8665d57991dd 100644 --- a/arch/xtensa/include/asm/page.h +++ b/arch/xtensa/include/asm/page.h @@ -109,26 +109,8 @@ typedef struct page *pgtable_t; #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) -/* - * Pure 2^n version of get_order - * Use 'nsau' instructions if supported by the processor or the generic version. - */ - -#if XCHAL_HAVE_NSA - -static inline __attribute_const__ int get_order(unsigned long size) -{ - int lz; - asm ("nsau %0, %1" : "=r" (lz) : "r" ((size - 1) >> PAGE_SHIFT)); - return 32 - lz; -} - -#else - # include -#endif - struct page; struct vm_area_struct; extern void clear_page(void *page); -- cgit v1.2.3-70-g09d2