Messages in this thread | | | From | Dan Williams <> | Date | Mon, 5 Feb 2018 10:44:07 -0800 | Subject | Re: [PATCH] libnvdimm: remove redundant assignment to pointer 'dev' |
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On Mon, Feb 5, 2018 at 10:20 AM, Ross Zwisler <ross.zwisler@linux.intel.com> wrote: > On Mon, Feb 05, 2018 at 02:08:52PM +0000, Colin King wrote: >> From: Colin Ian King <colin.king@canonical.com> >> >> Pointer dev is being assigned a value that is never read, it is being >> re-assigned the same value later on, hence the initialization is redundant >> and can be removed. >> >> Cleans up clang warning: >> drivers/nvdimm/pfn_devs.c:307:17: warning: Value stored to 'dev' during >> its initialization is never read >> >> Signed-off-by: Colin Ian King <colin.king@canonical.com> > > Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> > > More importantly this fixes a potential NULL pointer dereference. nd_pfn > is checked for NULL a few lines down, but we would have crashed here trying to > get nd_pfn->dev. >
No we wouldn't crash. We're just calculating the address, not de-referencing a NULL pointer.
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