diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/s390/include/asm/page.h | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/include/asm/Kbuild b/arch/s390/include/asm/Kbuild index 0633dc6d254d..f313f9cbcf44 100644 --- a/arch/s390/include/asm/Kbuild +++ b/arch/s390/include/asm/Kbuild @@ -1,3 +1,4 @@ generic-y += clkdev.h +generic-y += trace_clock.h diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index 6d5367060a56..39faa4ac9660 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -158,6 +158,9 @@ static inline int page_reset_referenced(unsigned long addr) * 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) |