On Sun, 2012-11-18 at 11:47 +0200, Vladimir Kondratiev wrote:
> I see 2 drivers that use dynamic prefix:
>
> - mentioned above drivers/tty/ipwireless/hardware.c
> - drivers/isdn/hardware/mISDN/
>
> I see several options:
>
> 1) require prefix_str to be constant. Patch code mentioned. For example,
> code above may reads:
>
> static void dump_data_bytes(const char *type, const unsigned char *data,
> unsigned length)
> {
> pr_debug(IPWIRELESS_PCCARD_NAME ": %s %s\n",
> type, data_type(data, length));
> print_hex_dump_bytes(IPWIRELESS_PCCARD_NAME, 0, (void *)data,
> length < DUMP_MAX_BYTES ? length : DUMP_MAX_BYTES);
> }
>
> 2) introduce fixed format string in DEFINE_DYNAMIC_DEBUG_METADATA, like
>
> DEFINE_DYNAMIC_DEBUG_METADATA((descriptor, "hexdump");
>
> 3) remove print_hex_dump_bytes from this patch
>
> I think 1) is the best, opinions?
Another option could be testing __builtin_constant_p(prefix)
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