lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86: PAT use reserve free memtype in set_memory_uc

Browse Source 
Use reserve_memtype and free_memtype interfaces in set_memory_uc/set_memory_wb
interfaces to avoid aliasing.
Usage model of set_memory_uc and set_memory_wb is for RAM memory and users
will first call set_memory_uc and call set_memory_wb after use to reset the
attribute.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
venkatesh.pallipadi@intel.com
2008-03-18 17:00:18 -07:00
committed by Ingo Molnar
parent d7677d4034
commit 1219333dfd
3 changed files with 23 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/mm/ioremap.c
View File

@@ -95,10 +95,10 @@ int ioremap_change_attr(unsigned long vaddr, unsigned long size,
switch (prot_val) {
case _PAGE_CACHE_UC:
default:
err = set_memory_uc(vaddr, nrpages);
err = _set_memory_uc(vaddr, nrpages);
break;
case _PAGE_CACHE_WB:
err = set_memory_wb(vaddr, nrpages);
err = _set_memory_wb(vaddr, nrpages);
break;
}