On Wednesday 18 May 2016 16:10:45 David Howells wrote: > cmpxchg_local() is not signed-value safe because on a 64-bit machine signed > int arguments to it may be sign-extended to signed long _before_ begin cast > to unsigned long. This potentially causes comparisons to fail when dealing > with negative values. > > Fix the generic atomic functions that are implemented in terms of cmpxchg() > to cast their arguments to unsigned int before calling cmpxchg(). > > Signed-off-by: David Howells <dhowells@xxxxxxxxxx> > Isn't the problem you describe something that cmpxchg() could prevent instead? Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
