diff options
| -rw-r--r-- | arch/x86_64/mm/pageattr.c | 42 |
1 files changed, 14 insertions, 28 deletions
diff --git a/arch/x86_64/mm/pageattr.c b/arch/x86_64/mm/pageattr.c index 35f1f1aab06..efe5af14c7d 100644 --- a/arch/x86_64/mm/pageattr.c +++ b/arch/x86_64/mm/pageattr.c @@ -77,26 +77,12 @@ static inline void flush_map(unsigned long address) on_each_cpu(flush_kernel_map, (void *)address, 1, 1); } -struct deferred_page { - struct deferred_page *next; - struct page *fpage; - unsigned long address; -}; -static struct deferred_page *df_list; /* protected by init_mm.mmap_sem */ - -static inline void save_page(unsigned long address, struct page *fpage) +static struct page *deferred_pages; /* protected by init_mm.mmap_sem */ + +static inline void save_page(struct page *fpage) { - struct deferred_page *df; - df = kmalloc(sizeof(struct deferred_page), GFP_KERNEL); - if (!df) { - flush_map(address); - __free_page(fpage); - } else { - df->next = df_list; - df->fpage = fpage; - df->address = address; - df_list = df; - } + fpage->lru.next = (struct list_head *)deferred_pages; + deferred_pages = fpage; } /* @@ -163,7 +149,7 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot, switch (page_count(kpte_page)) { case 1: - save_page(address, kpte_page); + save_page(kpte_page); revert_page(address, ref_prot); break; case 0: @@ -220,17 +206,17 @@ int change_page_attr(struct page *page, int numpages, pgprot_t prot) void global_flush_tlb(void) { - struct deferred_page *df, *next_df; + struct page *dpage; down_read(&init_mm.mmap_sem); - df = xchg(&df_list, NULL); + dpage = xchg(&deferred_pages, NULL); up_read(&init_mm.mmap_sem); - flush_map((df && !df->next) ? df->address : 0); - for (; df; df = next_df) { - next_df = df->next; - if (df->fpage) - __free_page(df->fpage); - kfree(df); + + flush_map((dpage && !dpage->lru.next) ? (unsigned long)page_address(dpage) : 0); + while (dpage) { + struct page *tmp = dpage; + dpage = (struct page *)dpage->lru.next; + __free_page(tmp); } } |