On Tue, Dec 12, 2017 at 11:14:36AM +0100, Arnd Bergmann wrote:
1 drivers/firmware/efi/esrt.c:445:2: error: implicit declaration of function 'memunmap' [-Werror=implicit-function-declaration]
Backporting commit 89c5a2d34bda ("efi/esrt: Use memunmap() instead of kfree() to free the remapping") depends on commit
f58a37b2e01f ("efi/esrt: Use memremap not ioremap to access ESRT table in memory")
which was also merged into linux-4.9. To backport those to into kernels earlier than v4.3, you'd also need commit 92281dee825f ("arch: introduce memremap()"), which is probably too invasive to backport.
I've now fixed this issue, will look at the other one now, thanks.
greg k-h