On Fri, Sep 21, 2018 at 11:16:56PM +0100, James Morse wrote:

ghes_copy_tofrom_phys() uses a different fixmap slot depending on in_nmi().
This doesn't work when we have multiple NMI-like notifications, that
can interrupt each other.

As with the locking, move the chosen fixmap_idx to the notification helper.
This only matters for NMI-like notifications, anything calling
ghes_proc() can use the IRQ fixmap slot as its already holding an irqsave
spinlock.

This lets us collapse the ghes_ioremap_pfn_*() helpers.

Signed-off-by: James Morse <james.morse@arm.com>
---

The fixmap-idx and vaddr are passed back to ghes_unmap()
to allow ioremap() to be used in process context in the
future.
---
 drivers/acpi/apei/ghes.c | 76 ++++++++++++++--------------------------
 1 file changed, 27 insertions(+), 49 deletions(-)

Nice.

Reviewed-by: Borislav Petkov <redacted>

-- 
Regards/Gruss,
    Boris.

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