Messages in this thread | | | Date | Wed, 7 Nov 2007 14:20:03 -0500 | From | Steven Rostedt <> | Subject | Re: [PATCH] mm/memory.c: remove warning from an uninitialized spinlock. was: Re: 2.6.21-rc7-mm2 |
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> > Introduce a macro for suppressing gcc from generating a warning about a > probable uninitialized state of a variable. > > Example: > > - spinlock_t *ptl; > + spinlock_t *uninitialized_var(ptl); > > Not a happy solution, but those warnings are obnoxious. > > - Using the usual pointlessly-set-it-to-zero approach wastes several > bytes of text. > > - Using a macro means we can (hopefully) do something else if gcc changes > cause the `x = x' hack to stop working > > - Using a macro means that people who are worried about hiding true bugs > can easily turn it off. > > Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
I just stumbled across this being in the kernel. Well, I'm finally glad it made it in, even though it was suggested one year earlier ;-)
http://lkml.org/lkml/2006/5/11/50
-- Steve
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