On Sat, Nov 14, 2020 at 5:16 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Sat, Nov 14, 2020 at 03:46:41PM +0000, Jonathan Cameron wrote: > > On Mon, 2 Nov 2020 15:22:25 +0100 > > Bartosz Golaszewski <brgl@xxxxxxxx> wrote: > > > > > From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> > > > > > > When allocating an array of elements, users should check for > > > multiplication overflow or preferably use one of the provided helpers > > > like: devm_kmalloc_array(). > > > > > > This provides devm_krealloc_array() for users who want to reallocate > > > managed arrays. > > > > > > Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> > > > > +CC Greg KH. > > > > As this is going into a very generic place I'd like a relevant ack. > > That file is a bit of a wild west for acks, but Greg seems most > > appropriate person. > > > > So Greg, any comments on this one? > > As there is only 1 user of this function in the patch series, you don't > save any extra code space here, I don't think this is worth it. > It's worth it in that the overflow check before allocation doesn't seem to belong in a driver IMO but is a general check that should live in common code. > We are seeing less and less gains from these new devm_* additions, and > only more confusion and problems with them. So perhaps don't add this? > I don't think it is needed. > I think you're referring to the discussion on devm_platform_ioremap_resource()? I would argue that consolidation of common operations in helpers is rarely a bad thing but it's a discussion for another thread. I'm not too attached to this patch - if you think this should be dropped then fine, but I don't see how the name devm_krealloc_array() can confuse anyone. Bartosz
