redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

x86: CPA use the existing pfn in split as well 

When splitting large pages, we ge the pfn from the existing entry
instead of calculating it ourself.

This removes the last remaining range restriction of the cpa code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Thomas Gleixner 2008-02-04 16:48:05 +01:00 committed by Ingo Molnar
parent 626c2c9d06
commit 63c1dcf4bc
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/x86/mm/pageattr.c
View File

@ -221,8 +221,7 @@ static int split_large_page(pte_t *kpte, unsigned long address)
{
pgprot_t ref_prot = pte_pgprot(pte_clrhuge(*kpte));
gfp_t gfp_flags = GFP_KERNEL;
unsigned long flags;
unsigned long addr;
unsigned long flags, addr, pfn;
pte_t *pbase, *tmp;
struct page *base;
unsigned int i, level;
@ -253,8 +252,12 @@ static int split_large_page(pte_t *kpte, unsigned long address)
paravirt_alloc_pt(&init_mm, page_to_pfn(base));
#endif
for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE)
set_pte(&pbase[i], pfn_pte(addr >> PAGE_SHIFT, ref_prot));
/*
* Get the target pfn from the original entry:
*/
pfn = pte_pfn(*kpte);
for (i = 0; i < PTRS_PER_PTE; i++, pfn++)
set_pte(&pbase[i], pfn_pte(pfn, ref_prot));
/*
* Install the new, split up pagetable. Important detail here: