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| author | Michel Lespinasse <walken@google.com> | 2013-02-22 16:32:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:11 -0800 |
| commit | c22c0d6344c362b1dde5d8e160d3d07536aca120 (patch) | |
| tree | 00350da7f08f8a1b8495294bccc05d768fb1682e /mm/mmap.c | |
| parent | 81909b842107ef8ca499f46ecb9b7afd87c20c52 (diff) | |
| download | lwn-c22c0d6344c362b1dde5d8e160d3d07536aca120.tar.gz lwn-c22c0d6344c362b1dde5d8e160d3d07536aca120.zip | |
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>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 33 |
1 files changed, 16 insertions, 17 deletions
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)) { |