From: Michael Jeanson <mjeanson@efficios.com>
Date: Tue, 11 Feb 2020 16:20:41 +0000 (-0500)
Subject: fix: proc: decouple proc from VFS with "struct proc_ops" (v5.6)
X-Git-Tag: v2.10.14~8
X-Git-Url: http://git.lttng.org/?a=commitdiff_plain;h=dd054d094b5d0bb7248ecfd32b021e124ed2b774;hp=dd054d094b5d0bb7248ecfd32b021e124ed2b774;p=lttng-modules.git

fix: proc: decouple proc from VFS with "struct proc_ops" (v5.6)

See upstream commit :

  commit d56c0d45f0e27f814e87a1676b6bdccccbc252e9
  Author: Alexey Dobriyan <adobriyan@gmail.com>
  Date:   Mon Feb 3 17:37:14 2020 -0800

    proc: decouple proc from VFS with "struct proc_ops"

    Currently core /proc code uses "struct file_operations" for custom hooks,
    however, VFS doesn't directly call them.  Every time VFS expands
    file_operations hook set, /proc code bloats for no reason.

    Introduce "struct proc_ops" which contains only those hooks which /proc
    allows to call into (open, release, read, write, ioctl, mmap, poll).  It
    doesn't contain module pointer as well.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---