On Sat, Oct 19, 2024 at 03:01:46PM +0530, Akhil P Oommen wrote: > On Fri, Oct 18, 2024 at 03:11:38PM +0000, Arnd Bergmann wrote: > > From: Arnd Bergmann <arnd@xxxxxxxx> > > > > Clang-19 and above sometimes end up with multiple copies of the large > > a6xx_hfi_msg_bw_table structure on the stack. The problem is that > > a6xx_hfi_send_bw_table() calls a number of device specific functions to > > fill the structure, but these create another copy of the structure on > > the stack which gets copied to the first. > > > > If the functions get inlined, that busts the warning limit: > > > > drivers/gpu/drm/msm/adreno/a6xx_hfi.c:631:12: error: stack frame size (1032) exceeds limit (1024) in 'a6xx_hfi_send_bw_table' [-Werror,-Wframe-larger-than] > > Why does this warning says that the limit is 1024? 1024 bytes is too small, isn't it? Kernel stacks are expected to be space limited, so 1024 is a logical limit for a single function. -- With best wishes Dmitry
