xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc32: Remove clear_pages() and define clear_page() inline

Browse Source 
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>
This commit is contained in:
Christophe Leroy
2016-02-09 17:08:25 +01:00
committed by Scott Wood
parent d6bfa02fcc
commit 5736f96d12
3 changed files with 14 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
arch/powerpc/kernel/misc_32.S
View File

@@ -516,22 +516,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
blr
#endif /* CONFIG_BOOKE */
/*
* Clear pages 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.
*
* void clear_pages(void *page, int order) ;
*/
_GLOBAL(clear_pages)
li r0,PAGE_SIZE/L1_CACHE_BYTES
slw r0,r0,r4
mtctr r0
1: dcbz 0,r3
addi r3,r3,L1_CACHE_BYTES
bdnz 1b
blr
/*
* Copy a whole page. We use the dcbz instruction on the destination
* to reduce memory traffic (it eliminates the unnecessary reads of