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For unprivileged Xen PV guests this is normal memory and ioremap will
not be able to properly map it.
While at it, since ioremap may return NULL, add a test for pointer's
validity.
Reported-by: Andy Smith <andy@strugglers.net>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: hpa@zytor.com
Cc: xen-devel@lists.xenproject.org
Cc: jgross@suse.com
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180911195538.23289-1-boris.ostrovsky@oracle.com
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The seperation of the EISA init missed to include linux/io.h which breaks
the build with some special configurations.
Reported-by: Ingo Molnar <mingo@kernel.org>
Fixes: f7eaf6e00fd5 ("x86/boot: Move EISA setup to a separate file")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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EISA has absolutely nothing to do with traps, so move it out of traps.c
into its own eisa.c file.
Furthermore, the EISA bus detection does not need to run during
very early boot, it's good enough to run it before the EISA bus
and drivers are initialized.
I.e. instead of calling it from the very early trap_init() code,
make it a subsys_initcall().
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064956.515322409@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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