diff options
Diffstat (limited to 'arch/s390/include/asm/page.h')
| -rw-r--r-- | arch/s390/include/asm/page.h | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index a86ad4084073..75ce9b065f9f 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -155,28 +155,6 @@ static inline int page_reset_referenced(unsigned long addr) #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */ /* - * Test and clear dirty bit in storage key. - * We can't clear the changed bit atomically. This is a potential - * race against modification of the referenced bit. This function - * should therefore only be called if it is not mapped in any - * address space. - * - * Note that the bit gets set whenever page content is changed. That means - * also when the page is modified by DMA or from inside the kernel. - */ -#define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_DIRTY -static inline int page_test_and_clear_dirty(unsigned long pfn, int mapped) -{ - unsigned char skey; - - skey = page_get_storage_key(pfn << PAGE_SHIFT); - if (!(skey & _PAGE_CHANGED)) - return 0; - page_set_storage_key(pfn << PAGE_SHIFT, skey & ~_PAGE_CHANGED, mapped); - return 1; -} - -/* * Test and clear referenced bit in storage key. */ #define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG |