sh: Fix mmap2 for handling differing PAGE_SIZEs.
mmap2 uses a fixed page shift of 12, regardless of the PAGE_SIZE setting.
Fix up the mmap2 code to add some sanity checks on the mapping, and to
update pgoff accordingly.
Error handling bits based on 4280e3126f
("frv: fix mmap2 error handling").
Signed-off-by: Toshinobu Sugioka <sugioka@itonet.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -63,6 +63,15 @@ asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long pgoff)
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unsigned long fd, unsigned long pgoff)
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{
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{
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/*
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* The shift for mmap2 is constant, regardless of PAGE_SIZE
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* setting.
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*/
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if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))
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return -EINVAL;
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pgoff >>= PAGE_SHIFT - 12;
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return do_mmap2(addr, len, prot, flags, fd, pgoff);
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return do_mmap2(addr, len, prot, flags, fd, pgoff);
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}
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}
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