On Monday 23 July 2007 18:05:43 Satyam Sharma wrote: > From: Satyam Sharma <[EMAIL PROTECTED]> > > [3/8] i386: bitops: Rectify bogus "+m" constraints > > From the gcc manual: > > Extended asm supports input-output or read-write operands. Use the > constraint character `+' to indicate such an operand and list it with > the output operands. You should only use read-write operands when the > constraints for the operand (or the operand in which only some of the > bits are to be changed) allow a register. > > So, using the "+" constraint modifier for memory, like "+m" is bogus. > We must simply specify "=m" which handles the case correctly.
I checked with Honza (cc'ed) and he stated that the + are really needed at least in newer gcc. -Andi - 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/
