Re: [PATCH v1 0/4] staging: fbtft: reduce stack usage by avoiding large write_reg() varargs

On Sun, Jan 04, 2026 at 07:06:34PM +0800, Sun Jian wrote:

This series fixes clang `-Wframe-larger-than=1024` warnings in the fbtft
staging drivers.

The warnings are triggered by very large `write_reg()`/`write_register()`
varargs calls, which result in excessive stack usage.

Switch the affected paths to send a u8 command byte followed by the u8
payload using `fbtft_write_buf_dc()`. The register values and ordering are
kept unchanged; only the transfer method is updated.

Looking at the patches I think this is wrong. W.o. detailed test pattern
provided and the list of the devices, NAK.

If you want to address a warning without HW being accessible, perhaps you just
need a simple bump in the Makefile as an exception, however it's also doubtful
as it will hide a potential issue with the stack in the future.

-- 
With Best Regards,
Andy Shevchenko