On Thu, 2012-11-22 at 14:14 +0300, Dan Carpenter wrote: > On Thu, Nov 22, 2012 at 12:31:37PM +0200, Artem Bityutskiy wrote: > > On Sat, 2012-11-17 at 18:11 +0300, Dan Carpenter wrote: > > > out_len = le32_to_cpu(dn->size); > > > - buf = kmalloc(out_len * WORST_COMPR_FACTOR, GFP_NOFS); > > > + buf = kmalloc_array(out_len, WORST_COMPR_FACTOR, GFP_NOFS); > > > if (!buf) > > > return -ENOMEM; > > > > I think this makes the code unreadable, because we really allocate a > > buffer, not an array. > > The problem with the original code is that the multiply looks very > suspect. Everyone who reads it has to backtrack to find where > dn->size is capped. > > I guess in one sense we never allocate an array, we always declare > it on the stack. We debated the naming and there really isn't a > good name. kmalloc_safe() isn't right either. But anyway, the > intent is that eventually someone will right a coccinelle script > which replaces all these allocations with kmalloc_array(). Did you consider kcalloc() ? Just like malloc() / calloc() libc functions? -- Best Regards, Artem Bityutskiy
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