Re: [alsa-devel] Question on arm64 unaligned faults during playback

Abhilash Kesavan wrote:

Currently, if I continue to use the SRAM allocation driver, two options are working:

1. ioremap to ioremap_wc in drivers/misc/sram.c.
2. copy_from_user to copy_from_user_toio in sound/core/pcm_lib.c

Which would be the preferred option ?

I don't know how to tell the SRAM allocator to hand out WC memory, but copy_from_user_toio() is what you would put into your .copy callback.

Regards, Clemens