ROOT CAUSE: In kernel headers, a feature that nvidia code depends on,
has been removed in kernel 3.19:
$ diff linux-headers-3.18.0-13/include/linux/fs.h
linux-headers-3.19.0-7/include/linux/fs.h | grep f_dentry
< #define f_dentry f_path.dentry
WORKAROUND: Make nvidia code live without that feature:
$ sudo sed -i~ s/f_dentry/f_path.dentry/ /usr/src/nvidia-304-304.125/nv.c
$ apt list --installed 'linux*' | cut -d / -f 1 | grep 3.19 | xargs sudo
apt install --reinstall
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https://bugs.launchpad.net/bugs/1409190
Title:
nvidia-331-updates 331.113-0ubuntu0.0.4: nvidia-331-updates kernel
module failed to build [error: ‘struct file’ has no member named
‘f_dentry’]
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https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-304/+bug/1409190/+subscriptions
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