From: Bob Picco <bpicco@xxxxxxxxxx> Date: Mon, 3 Mar 2014 12:00:35 -0500 > From: bob picco <bpicco@xxxxxxxxxx> > > This patch adds support to enable STRICT_DEVMEM for sparc64. By selecting the > new config option you enable this feature. > > CC: Sam Ravnborg <sam@xxxxxxxxxxxx> > Signed-off-by: Bob Picco <bob.picco@xxxxxxxxxx> Ok, I looked more deeply into this and I'm going to rescind my request to use kern_addr_valid(). This devmem_is_allowed() seems to also want to allow non-RAM MMIO accesses too. So using the iomem resource is probably the way to go. Two things: 1) We have to make sure caching will be disabled and the side-effect bit will be set in accesses to non-RAM pages. 2) Our implementation of devmem_is_allowed() should be aligned as much as possible with other implementations. Perhaps powerpc is the best example to use. Thanks. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
