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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-05-06 23:50:13 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 21:12:57 +0200 |
| commit | 06abdfb47ee745a4d79721de24260815ec6bca2b (patch) | |
| tree | afbf3f7a0f020529317ec115d2b5f62f67c84404 | |
| parent | get_unmapped_area handles MAP_FIXED in hugetlbfs (diff) | |
| download | linux-06abdfb47ee745a4d79721de24260815ec6bca2b.tar.xz linux-06abdfb47ee745a4d79721de24260815ec6bca2b.zip | |
get_unmapped_area handles MAP_FIXED in generic code
generic arch_get_unmapped_area() now handles MAP_FIXED. Now that all
implementations have been fixed, change the toplevel get_unmapped_area() to
call into arch or drivers for the MAP_FIXED case.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Grant Grundler <grundler@parisc-linux.org>
Cc: Matthew Wilcox <willy@debian.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: William Irwin <bill.irwin@oracle.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/mmap.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 88da687bde89..a6b7c796352b 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1200,6 +1200,9 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, if (len > TASK_SIZE) return -ENOMEM; + if (flags & MAP_FIXED) + return addr; + if (addr) { addr = PAGE_ALIGN(addr); vma = find_vma(mm, addr); @@ -1273,6 +1276,9 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, if (len > TASK_SIZE) return -ENOMEM; + if (flags & MAP_FIXED) + return addr; + /* requesting a specific address */ if (addr) { addr = PAGE_ALIGN(addr); @@ -1361,22 +1367,21 @@ get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { unsigned long ret; - - if (!(flags & MAP_FIXED)) { - unsigned long (*get_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long); - - get_area = current->mm->get_unmapped_area; - if (file && file->f_op && file->f_op->get_unmapped_area) - get_area = file->f_op->get_unmapped_area; - addr = get_area(file, addr, len, pgoff, flags); - if (IS_ERR_VALUE(addr)) - return addr; - } + unsigned long (*get_area)(struct file *, unsigned long, + unsigned long, unsigned long, unsigned long); + + get_area = current->mm->get_unmapped_area; + if (file && file->f_op && file->f_op->get_unmapped_area) + get_area = file->f_op->get_unmapped_area; + addr = get_area(file, addr, len, pgoff, flags); + if (IS_ERR_VALUE(addr)) + return addr; if (addr > TASK_SIZE - len) return -ENOMEM; if (addr & ~PAGE_MASK) return -EINVAL; + if (file && is_file_hugepages(file)) { /* * Check if the given range is hugepage aligned, and |