• Arnd Bergmann's avatar
    mISDN: avoid arch specific __builtin_return_address call · 3e7a8716
    Arnd Bergmann authored
    Not all architectures are able to call __builtin_return_address().
    On ARM, the mISDN code produces this warning:
    hardware/mISDN/w6692.c: In function 'w6692_dctrl':
    hardware/mISDN/w6692.c:1181:75: warning: unsupported argument to '__builtin_return_address'
      pr_debug("%s: %s dev(%d) open from %p\n", card->name, __func__,
    hardware/mISDN/mISDNipac.c: In function 'open_dchannel':
    hardware/mISDN/mISDNipac.c:759:75: warning: unsupported argument to '__builtin_return_address'
      pr_debug("%s: %s dev(%d) open from %p\n", isac->name, __func__,
    In a lot of cases, this is relatively easy to work around by
    passing the value of __builtin_return_address(0) from the
    callers into the functions that want it. One exception is
    the indirect 'open' function call in struct isac_hw. While it
    would be possible to fix this as well, this patch only addresses
    the other callers properly and lets this one return the direct
    parent function, which should be good enough.
    Signed-off-by: 's avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
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