diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2016-02-09 19:08:25 +0300 |
|---|---|---|
| committer | Scott Wood <oss@buserror.net> | 2016-03-12 02:20:11 +0300 |
| commit | 5736f96d12dd4204d3aac43bf7b512ab434b904f (patch) | |
| tree | 396af6f695328a3ab83feecb6b424c8c09616aa3 /arch/powerpc/include | |
| parent | d6bfa02fccf58b957f457c1bd0bb71f6ab169a0b (diff) | |
| download | linux-5736f96d12dd4204d3aac43bf7b512ab434b904f.tar.xz | |
powerpc32: Remove clear_pages() and define clear_page() inline
clear_pages() is never used expect by clear_page, and PPC32 is the
only architecture (still) having this function. Neither PPC64 nor
any other architecture has it.
This patch removes clear_pages() and moves clear_page() function
inline (same as PPC64) as it only is a few isns
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/page_32.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/page_32.h b/arch/powerpc/include/asm/page_32.h index 68d73b2a7bfc..6a8e1797f223 100644 --- a/arch/powerpc/include/asm/page_32.h +++ b/arch/powerpc/include/asm/page_32.h @@ -1,6 +1,8 @@ #ifndef _ASM_POWERPC_PAGE_32_H #define _ASM_POWERPC_PAGE_32_H +#include <asm/cache.h> + #if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0) #if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0 #error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN" @@ -36,9 +38,18 @@ typedef unsigned long long pte_basic_t; typedef unsigned long pte_basic_t; #endif -struct page; -extern void clear_pages(void *page, int order); -static inline void clear_page(void *page) { clear_pages(page, 0); } +/* + * Clear page using the dcbz instruction, which doesn't cause any + * memory traffic (except to write out any cache lines which get + * displaced). This only works on cacheable memory. + */ +static inline void clear_page(void *addr) +{ + unsigned int i; + + for (i = 0; i < PAGE_SIZE / L1_CACHE_BYTES; i++, addr += L1_CACHE_BYTES) + dcbz(addr); +} extern void copy_page(void *to, void *from); #include <asm-generic/getorder.h> |