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authorMichel Lespinasse <walken@google.com>2013-02-22 16:32:43 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-23 17:50:11 -0800
commitc22c0d6344c362b1dde5d8e160d3d07536aca120 (patch)
tree00350da7f08f8a1b8495294bccc05d768fb1682e
parent81909b842107ef8ca499f46ecb9b7afd87c20c52 (diff)
mm: remove flags argument to mmap_region
After the MAP_POPULATE handling has been moved to mmap_region() call sites, the only remaining use of the flags argument is to pass the MAP_NORESERVE flag. This can be just as easily handled by do_mmap_pgoff(), so do that and remove the mmap_region() flags parameter. [akpm@linux-foundation.org: remove double parens] Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: Rik van Riel <riel@redhat.com> Tested-by: Andy Lutomirski <luto@amacapital.net> Cc: Greg Ungerer <gregungerer@westnet.com.au> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/tile/mm/elf.c1
-rw-r--r--include/linux/mm.h3
-rw-r--r--mm/fremap.c3
-rw-r--r--mm/mmap.c33
4 files changed, 18 insertions, 22 deletions
diff --git a/arch/tile/mm/elf.c b/arch/tile/mm/elf.c
index 3cfa98bf9125..743c951c61b0 100644
--- a/arch/tile/mm/elf.c
+++ b/arch/tile/mm/elf.c
@@ -130,7 +130,6 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
if (!retval) {
unsigned long addr = MEM_USER_INTRPT;
addr = mmap_region(NULL, addr, INTRPT_SIZE,
- MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE,
VM_READ|VM_EXEC|
VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, 0);
if (addr > (unsigned long) -PAGE_SIZE)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index da0a0fe970c2..8332f3069fe3 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1472,8 +1472,7 @@ extern int install_special_mapping(struct mm_struct *mm,
extern unsigned long get_unmapped_area(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
extern unsigned long mmap_region(struct file *file, unsigned long addr,
- unsigned long len, unsigned long flags,
- vm_flags_t vm_flags, unsigned long pgoff);
+ unsigned long len, vm_flags_t vm_flags, unsigned long pgoff);
extern unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
unsigned long len, unsigned long prot, unsigned long flags,
unsigned long pgoff, bool *populate);
diff --git a/mm/fremap.c b/mm/fremap.c
index b42e32171530..503a72387087 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -204,9 +204,8 @@ get_write_lock:
unsigned long addr;
struct file *file = get_file(vma->vm_file);
- flags = (flags & MAP_NONBLOCK) | MAP_POPULATE;
addr = mmap_region(file, start, size,
- flags, vma->vm_flags, pgoff);
+ vma->vm_flags, pgoff);
fput(file);
if (IS_ERR_VALUE(addr)) {
err = addr;
diff --git a/mm/mmap.c b/mm/mmap.c
index a23e30f9719c..d6bc39e939ab 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1291,7 +1291,21 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
}
}
- addr = mmap_region(file, addr, len, flags, vm_flags, pgoff);
+ /*
+ * Set 'VM_NORESERVE' if we should not account for the
+ * memory use of this mapping.
+ */
+ if (flags & MAP_NORESERVE) {
+ /* We honor MAP_NORESERVE if allowed to overcommit */
+ if (sysctl_overcommit_memory != OVERCOMMIT_NEVER)
+ vm_flags |= VM_NORESERVE;
+
+ /* hugetlb applies strict overcommit unless MAP_NORESERVE */
+ if (file && is_file_hugepages(file))
+ vm_flags |= VM_NORESERVE;
+ }
+
+ addr = mmap_region(file, addr, len, vm_flags, pgoff);
if (!IS_ERR_VALUE(addr) &&
((vm_flags & VM_LOCKED) ||
(flags & (MAP_POPULATE | MAP_NONBLOCK)) == MAP_POPULATE))
@@ -1411,8 +1425,7 @@ static inline int accountable_mapping(struct file *file, vm_flags_t vm_flags)
}
unsigned long mmap_region(struct file *file, unsigned long addr,
- unsigned long len, unsigned long flags,
- vm_flags_t vm_flags, unsigned long pgoff)
+ unsigned long len, vm_flags_t vm_flags, unsigned long pgoff)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma, *prev;
@@ -1436,20 +1449,6 @@ munmap_back:
return -ENOMEM;
/*
- * Set 'VM_NORESERVE' if we should not account for the
- * memory use of this mapping.
- */
- if ((flags & MAP_NORESERVE)) {
- /* We honor MAP_NORESERVE if allowed to overcommit */
- if (sysctl_overcommit_memory != OVERCOMMIT_NEVER)
- vm_flags |= VM_NORESERVE;
-
- /* hugetlb applies strict overcommit unless MAP_NORESERVE */
- if (file && is_file_hugepages(file))
- vm_flags |= VM_NORESERVE;
- }
-
- /*
* Private writable mapping: check memory availability
*/
if (accountable_mapping(file, vm_flags)) {