On Sep 17, 2007, 2:57 +0200, shinkoi2005a <[EMAIL PROTECTED]> wrote: > Hi, all > > I have a question about printk format. > > Can printk format use "%4.4s"?
Yes it can. The precision part of the format determines the max number of characters to copy from the string. The 4 byte signature array might not null terminated so you must use the .4 in the format otherwise vsnprintf might look over the buffer for the terminating '\0'. > This format is used following source. > > ############# > drivers/acpi/tables/tbinstal.c > ACPI_ERROR((AE_INFO, > "Table has invalid signature [%4.4s], must be > SSDT, PSDT or OEMx", > table_desc->pointer->signature)); > > ############## > At least, my dmesg is buggy output like that.. Hmm, looks like you should believe the error messages rather than blaming the code for buggy output ;-) Like it says, the table seems corrupt, has invalid signature and checksum. > > ############## > $ dmesg > (snip) > ACPI Warning (tbutils-0158): Incorrect checksum in table [ ^E礑 - 00, should > b > e F6 [20070126] > ACPI Error (tbinstal-0134): Table has invalid signature [ ^E礑, must be SSDT, > P > SDT or OEMx [20070126] > (snip) > ############## > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
