Re: [PATCH net-next v2 1/7] net: stmmac: provide plat_dat->dma_cfg in stmmac_plat_dat_alloc()

On Mon, Mar 09, 2026 at 09:39:18AM +0000, Russell King (Oracle) wrote:

plat_dat->dma_cfg is unconditionally required for the operation of the
driver, so it would make sense to allocate it along with the plat_dat.

On Arm64, sizeof(*plat_dat) has recently shrunk from 880 to 816 bytes
and sizeof(*plat_dat->dma_cfg) has shrunk from 32 to 20 bytes.

Given that dma_cfg is required, and it is now less than a cache line,
It doesn't make sense to allocate this separateny, so place it at the
end of struct plat_stmmacenet_data, and set plat_dat->dma_cfg to point
at that to avoid mass changes.

Signed-off-by: Russell King (Oracle) <redacted>
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Reviewed-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>

	Ayaan