diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb.c | 9 | ||||
| -rw-r--r-- | mm/memory.c | 2 | ||||
| -rw-r--r-- | mm/rmap.c | 3 |
3 files changed, 9 insertions, 5 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 254ce2b90158..28a2980ee435 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -17,7 +17,7 @@ #include <linux/mutex.h> #include <linux/bootmem.h> #include <linux/sysfs.h> - +#include <asm/io.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/io.h> @@ -1283,7 +1283,12 @@ module_exit(hugetlb_exit); static int __init hugetlb_init(void) { - BUILD_BUG_ON(HPAGE_SHIFT == 0); + /* Some platform decide whether they support huge pages at boot + * time. On these, such as powerpc, HPAGE_SHIFT is set to 0 when + * there is no such support + */ + if (HPAGE_SHIFT == 0) + return 0; if (!size_to_hstate(default_hstate_size)) { default_hstate_size = HPAGE_SIZE; diff --git a/mm/memory.c b/mm/memory.c index 0e4eea10c7b0..6793b9c68107 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -993,7 +993,6 @@ unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address, tlb_finish_mmu(tlb, address, end); return end; } -EXPORT_SYMBOL_GPL(zap_page_range); /** * zap_vma_ptes - remove ptes mapping the vma @@ -1111,7 +1110,6 @@ no_page_table: } return page; } -EXPORT_SYMBOL_GPL(follow_page); /* Can we do the FOLL_ANON optimization? */ static inline int use_zero_page(struct vm_area_struct *vma) diff --git a/mm/rmap.c b/mm/rmap.c index 99bc3f9cd796..94a5246a3f98 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -667,7 +667,8 @@ void page_remove_rmap(struct page *page, struct vm_area_struct *vma) * Leaving it set also helps swapoff to reinstate ptes * faster for those pages still in swapcache. */ - if (page_test_dirty(page)) { + if ((!PageAnon(page) || PageSwapCache(page)) && + page_test_dirty(page)) { page_clear_dirty(page); set_page_dirty(page); } |