tree d60f9e1875ca9fe64a831be8ec83bebcc416257a
parent 1c4facb846c7f863bc65483394e80acdbacf671b
author Tobin C. Harding <me@tobin.cc> 1529622934 +1000
committer Theodore Ts'o <tytso@mit.edu> 1531877568 -0400

vsprintf: Add command line option debug_boot_weak_hash

Currently printing [hashed] pointers requires enough entropy to be
available.  Early in the boot sequence this may not be the case
resulting in a dummy string '(____ptrval____)' being printed.  This
makes debugging the early boot sequence difficult.  We can relax the
requirement to use cryptographically secure hashing during debugging.
This enables debugging while keeping development/production kernel
behaviour the same.

If new command line option debug_boot_weak_hash is enabled use
cryptographically insecure hashing and hash pointer value immediately.

Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>