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Date: Tue, 30 Oct 2007 16:13:52 -0700 From: Randy Dunlap <rdunlap@...otime.net> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Jeff Mahoney <jeffm@...e.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH] mmap: restore -ENODEV on missing f_op->mmap On Tue, 30 Oct 2007 15:45:56 -0700 (PDT) Linus Torvalds wrote: > > > On Tue, 30 Oct 2007, Jeff Mahoney wrote: > > > > Personally, I think this is probably a case of LTP codifying existing > > behavior rather than testing the for the specification. If that's the case > > and nobody really cares about the change in behavior, I'm fine letting this > > drop. > > Hmm.. I think it's kind of stupid adding that special case early on, just > to get one particular error case return when there are multiple possible > ones. > > I don't care deeply, but this does smell like a test issue rather than a > code issue. > > Looking at that path, there are *other* things that might be worth > cleaning up, but this wasn't one of them.. Jeff, will you (at least) notify the LTP project of this issue and need for a patch? Thanks. > --- > diff --git a/mm/mmap.c b/mm/mmap.c > index facc1a7..fe286f7 100644 > --- a/mm/mmap.c > +++ b/mm/mmap.c > @@ -893,7 +893,6 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr, > unsigned long flags, unsigned long pgoff) > { > struct mm_struct * mm = current->mm; > - struct inode *inode; > unsigned int vm_flags; > int error; > int accountable = 1; > @@ -959,9 +958,9 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr, > return -EAGAIN; > } > > - inode = file ? file->f_path.dentry->d_inode : NULL; > - > if (file) { > + struct inode *inode = file->f_path.dentry->d_inode; > + > switch (flags & MAP_TYPE) { > case MAP_SHARED: > if ((prot&PROT_WRITE) && !(file->f_mode&FMODE_WRITE)) > - --- ~Randy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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