Hi,

On Mon, Mar 19, 2018 at 10:19:32PM +1100, Michael Ellerman wrote:

Michael Ellerman [off-list ref] writes:

quoted

Jonathan Neuschäfer [off-list ref] writes:

[...]

quoted

quoted

-	if (slab_is_available() && (p < virt_to_phys(high_memory)) &&
+	if (page_is_ram(__phys_to_pfn(p)) &&
 	    !(__allow_ioremap_reserved && memblock_is_region_reserved(p, size))) {
 		printk("__ioremap(): phys addr 0x%llx is RAM lr %ps\n",
 		       (unsigned long long)p, __builtin_return_address(0));

This is killing my p5020ds (Freescale e5500) unfortunately:

Duh, I should actually read the patch :)

This is a 32-bit system with 4G of RAM, so not all of RAM is mapped,
some of it is highem which is why removing the test against high_memory
above breaks it.

So I need the high_memory test on this system.

This is an oversight on my part. I thought I wouldn't need this test
because the memblock-based test is more accurate, but I didn't think
through how high memory actually works.

I'm not clear why it was a problem for you on the Wii, do you even build
the Wii kernel with HIGHMEM enabled?

No. The Wii works fine with the p < virt_to_phys(high_memory) test, and
doesn't use CONFIG_HIGHMEM.  I'll send a version two of this patchset.


Thanks for testing,
Jonathan Neuschäfer