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| author | Borislav Petkov <bp@suse.de> | 2013-03-21 18:16:57 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-04-10 14:39:08 +0200 |
| commit | 5952886bfeec065041d04dfcc2693b581e8f2424 (patch) | |
| tree | ad933521904188465cf9c032f8b086caa67b1af8 /arch/x86/mm/pageattr.c | |
| parent | ec7fd34425f6536ed4b3548e7aa712ee2718189c (diff) | |
| download | linux-5952886bfeec065041d04dfcc2693b581e8f2424.tar.gz linux-5952886bfeec065041d04dfcc2693b581e8f2424.tar.bz2 linux-5952886bfeec065041d04dfcc2693b581e8f2424.zip | |
x86/mm/cpa: Cleanup split_large_page() and its callee
So basically we're generating the pte_t * from a struct page and
we're handing it down to the __split_large_page() internal version
which then goes and gets back struct page * from it because it
needs it.
Change the caller to hand down struct page * directly and the
callee can compute the pte_t itself.
Net save is one virt_to_page() call and simpler code. While at
it, make __split_large_page() static.
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1363886217-24703-1-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/pageattr.c')
| -rw-r--r-- | arch/x86/mm/pageattr.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 091934e1d0d9..25b1d35c76cb 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -542,13 +542,14 @@ out_unlock: return do_split; } -int __split_large_page(pte_t *kpte, unsigned long address, pte_t *pbase) +static int +__split_large_page(pte_t *kpte, unsigned long address, struct page *base) { + pte_t *pbase = (pte_t *)page_address(base); unsigned long pfn, pfninc = 1; unsigned int i, level; pte_t *tmp; pgprot_t ref_prot; - struct page *base = virt_to_page(pbase); spin_lock(&pgd_lock); /* @@ -633,7 +634,6 @@ int __split_large_page(pte_t *kpte, unsigned long address, pte_t *pbase) static int split_large_page(pte_t *kpte, unsigned long address) { - pte_t *pbase; struct page *base; if (!debug_pagealloc) @@ -644,8 +644,7 @@ static int split_large_page(pte_t *kpte, unsigned long address) if (!base) return -ENOMEM; - pbase = (pte_t *)page_address(base); - if (__split_large_page(kpte, address, pbase)) + if (__split_large_page(kpte, address, base)) __free_page(base); return 0; |