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[Qemu-devel] [PATCH 07/17] mm: madvise MADV_USERFAULT: prepare vm_flags


From: Andrea Arcangeli
Subject: [Qemu-devel] [PATCH 07/17] mm: madvise MADV_USERFAULT: prepare vm_flags to allow more than 32bits
Date: Fri, 3 Oct 2014 19:07:57 +0200

We run out of 32bits in vm_flags, noop change for 64bit archs.

Signed-off-by: Andrea Arcangeli <address@hidden>
---
 fs/proc/task_mmu.c       | 4 ++--
 include/linux/huge_mm.h  | 4 ++--
 include/linux/ksm.h      | 4 ++--
 include/linux/mm_types.h | 2 +-
 mm/huge_memory.c         | 2 +-
 mm/ksm.c                 | 2 +-
 mm/madvise.c             | 2 +-
 mm/mremap.c              | 2 +-
 8 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index c341568..ee1c3a2 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -532,11 +532,11 @@ static void show_smap_vma_flags(struct seq_file *m, 
struct vm_area_struct *vma)
        /*
         * Don't forget to update Documentation/ on changes.
         */
-       static const char mnemonics[BITS_PER_LONG][2] = {
+       static const char mnemonics[BITS_PER_LONG+1][2] = {
                /*
                 * In case if we meet a flag we don't know about.
                 */
-               [0 ... (BITS_PER_LONG-1)] = "??",
+               [0 ... (BITS_PER_LONG)] = "??",
 
                [ilog2(VM_READ)]        = "rd",
                [ilog2(VM_WRITE)]       = "wr",
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index 63579cb..3aa10e0 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -121,7 +121,7 @@ extern void split_huge_page_pmd_mm(struct mm_struct *mm, 
unsigned long address,
 #error "hugepages can't be allocated by the buddy allocator"
 #endif
 extern int hugepage_madvise(struct vm_area_struct *vma,
-                           unsigned long *vm_flags, int advice);
+                           vm_flags_t *vm_flags, int advice);
 extern void __vma_adjust_trans_huge(struct vm_area_struct *vma,
                                    unsigned long start,
                                    unsigned long end,
@@ -183,7 +183,7 @@ static inline int split_huge_page(struct page *page)
 #define split_huge_page_pmd_mm(__mm, __address, __pmd) \
        do { } while (0)
 static inline int hugepage_madvise(struct vm_area_struct *vma,
-                                  unsigned long *vm_flags, int advice)
+                                  vm_flags_t *vm_flags, int advice)
 {
        BUG();
        return 0;
diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index 3be6bb1..8b35253 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -18,7 +18,7 @@ struct mem_cgroup;
 
 #ifdef CONFIG_KSM
 int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
-               unsigned long end, int advice, unsigned long *vm_flags);
+               unsigned long end, int advice, vm_flags_t *vm_flags);
 int __ksm_enter(struct mm_struct *mm);
 void __ksm_exit(struct mm_struct *mm);
 
@@ -94,7 +94,7 @@ static inline int PageKsm(struct page *page)
 
 #ifdef CONFIG_MMU
 static inline int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
-               unsigned long end, int advice, unsigned long *vm_flags)
+               unsigned long end, int advice, vm_flags_t *vm_flags)
 {
        return 0;
 }
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 6e0b286..2c876d1 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -217,7 +217,7 @@ struct page_frag {
 #endif
 };
 
-typedef unsigned long __nocast vm_flags_t;
+typedef unsigned long long __nocast vm_flags_t;
 
 /*
  * A region containing a mapping of a non-memory backed file under NOMMU
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index d9a21d06..e913a19 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1942,7 +1942,7 @@ out:
 #define VM_NO_THP (VM_SPECIAL | VM_HUGETLB | VM_SHARED | VM_MAYSHARE)
 
 int hugepage_madvise(struct vm_area_struct *vma,
-                    unsigned long *vm_flags, int advice)
+                    vm_flags_t *vm_flags, int advice)
 {
        switch (advice) {
        case MADV_HUGEPAGE:
diff --git a/mm/ksm.c b/mm/ksm.c
index fb75902..faf319e 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1736,7 +1736,7 @@ static int ksm_scan_thread(void *nothing)
 }
 
 int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
-               unsigned long end, int advice, unsigned long *vm_flags)
+               unsigned long end, int advice, vm_flags_t *vm_flags)
 {
        struct mm_struct *mm = vma->vm_mm;
        int err;
diff --git a/mm/madvise.c b/mm/madvise.c
index 0938b30..d5aee71 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -49,7 +49,7 @@ static long madvise_behavior(struct vm_area_struct *vma,
        struct mm_struct *mm = vma->vm_mm;
        int error = 0;
        pgoff_t pgoff;
-       unsigned long new_flags = vma->vm_flags;
+       vm_flags_t new_flags = vma->vm_flags;
 
        switch (behavior) {
        case MADV_NORMAL:
diff --git a/mm/mremap.c b/mm/mremap.c
index 05f1180..fa7db87 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -239,7 +239,7 @@ static unsigned long move_vma(struct vm_area_struct *vma,
 {
        struct mm_struct *mm = vma->vm_mm;
        struct vm_area_struct *new_vma;
-       unsigned long vm_flags = vma->vm_flags;
+       vm_flags_t vm_flags = vma->vm_flags;
        unsigned long new_pgoff;
        unsigned long moved_len;
        unsigned long excess = 0;



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