regmap: Allocate buffers with GFP_ATOMIC when fast_io == true
If a regmap is using fast_io, allocate the scratch buffer in regmap_bulk_write() with GFP_ATOMIC instead of GFP_KERNEL. Otherwise we may schedule while atomic. Reported-by: NAbhijeet Dharmapurikar <adharmap@codeaurora.org> Signed-off-by: NStephen Boyd <sboyd@codeaurora.org> Signed-off-by: NMark Brown <broonie@kernel.org>
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