On Thu, Apr 30, 2020 at 11:30:57PM +0200, Arnd Bergmann wrote: > When CONFIG_ARCH_NO_SG_CHAIN is set, op->sgl[0] cannot be dereferenced, > as gcc-10 now points out: > > drivers/nvme/host/fc.c: In function 'nvme_fc_init_request': > drivers/nvme/host/fc.c:1774:29: warning: array subscript 0 is outside the > bounds of an interior zero-length array 'struct scatterlist[0]' > [-Wzero-length-bounds] > 1774 | op->op.fcp_req.first_sgl = &op->sgl[0]; > | ^~~~~~~~~~~ > drivers/nvme/host/fc.c:98:21: note: while referencing 'sgl' > 98 | struct scatterlist sgl[NVME_INLINE_SG_CNT]; > | ^~~ > > I don't know if this is a legitimate warning or a false-positive. > If this is just a false alarm, the warning is easily suppressed > by interpreting the array as a pointer.
This looks like a surpression to be, but then again I find the new code actually cleaner, so I'm fine with it :)
