linux/nvme.h has been renamed in linux 4.4 about efivar

[woutershep]

I don't think that error is related to the listed commit but merely that you seem to be missing the linux headers. Atleast my linux headers of 4.4 seems to include a linux/nvme.h when doing make headers_install

However that linux/nvme.h that i have doesn't define all the needed things anymore since that mentioned commit. I think the error that you meant to paste was:

linux.c: In function 'eb_nvme_ns_id':
linux.c:48:27: error: 'NVME_IOCTL_ID' undeclared (first use in this function)
  uint64_t ret = ioctl(fd, NVME_IOCTL_ID, NULL);
                           ^
linux.c:48:27: note: each undeclared identifier is reported only once for each function it appears in

Instead that one is in the new uapi/linux/nvme_ioctl.h which is not installed through make headers_install.

[floppym]

Gentoo's linux-headers-4.4 packaging includes several patches. One of them changes headers_install to include nvme_ioctl.h instead of nvme.h. This patch is pending review on LKML.

https://lkml.org/lkml/2016/1/10/332

I guess we will have to see how this turns out in linux-4.5.

[floppym]

The patch got merged on the kernel master branch.

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a9cf8284b45110a4d98aea180a89c857e53bf850

[floppym]

I'm applying this patch downstream; if you find the solution acceptable, feel free to merge it.

https://gitweb.gentoo.org/repo/gentoo.git/tree/sys-libs/efivar/files/0.21-nvme_ioctl.h.patch

[vathpela]

Thanks, I've pulled this in to master.