BACKPORT: FROMGIT: mm: Move immutable fields of 'struct vm_fault' into anonymous struct
'struct vm_fault' contains both information about the fault being serviced alongside mutable fields contributing to the state of the fault-handling logic. Unfortunately, the distinction between the two is not clear-cut, and a number of callers end up manipulating the structure temporarily before restoring it when returning. Try to clean this up by moving the immutable fault information into an anonymous struct, which will later be marked as 'const'. Ideally, the 'flags' field would be part of the new structure too, but it seems as though the ->page_mkwrite() path is not ready for this yet. Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Suggested-by:Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/CAHk-=whYs9XsO88iqJzN6NC=D-dp2m0oYXuOoZ=eWnvv=5OA+w@mail.gmail.com Signed-off-by:
Will Deacon <will@kernel.org> Change-Id: If094fbaa416c31b7bf2d5b00f2474bd330a22cc5 Bug: 171278850 (cherry picked from commit 742d3372 https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/faultaround ) [vinmenon: changes for speculative page fault] Signed-off-by:
Vinayak Menon <vinmenon@codeaurora.org>
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