On Wed, Jul 30, 2014 at 09:13:08AM +0200, Markus Trippelsdorf wrote: > On 2014.07.30 at 08:53 +0200, Jakub Jelinek wrote: > > On Tue, Jul 29, 2014 at 06:49:09PM -0700, Greg Kroah-Hartman wrote: > > > 3.15-stable review patch. If anyone has any objections, please let me know. > > > > IMNSHO this is a too big hammer approach. The bug happened on a single > > file only (right?), so if anything, IMHO it could be disabled for that > > single file only, and better do it only for compilers with the bug. > > No. There are many more files affected. It just happens that Linus > analyzed the assembly of this single file (fair.c) and found a bug. > Just build your redhat distro kernel with GCC_COMPARE_DEBUG=1 and you'll > see. So unless someone analyzes the assembly output of all other > affected files by hand and finds no issues, one has to assume the worst. I'm talking about wrong-code issues. For -fcompare-debug, we indeed check it primarily during gcc bootstrap (through bootstrap-debug) and some testcases, and we'll certainly try to build some more code with -fcompare-debug and fix the issues. Jakub -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html