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Dominik Brodowski authored
pcmcia_dev_present is in and by itself buggy. Add a note specifying
why it is broken, and replace the broken locking -- taking a mutex
is a bad idea in IRQ context, from which this function is rarely
called -- by an atomic_t.

Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
04de0816
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