On Wed, Nov 09, 2016 at 01:26:53AM +0100, Arnd Bergmann wrote: > On Tuesday, November 8, 2016 4:17:47 PM CET Josh Triplett wrote: > > Some embedded systems can do without the prctl syscall, saving some space. > > > > This also avoids regular increases in tinyconfig size as people add more > > non-optional functionality to prctl (observed via the 0-day kernel > > infrastructure). > > > > The first patch moves prctl and all its helpers into a separate source file, > > kernel/prctl.c, to allow making it optional via the Makefile without any > > ifdefs. The second patch adds the Kconfig option to make prctl optional. > > > > Josh Triplett (2): > > kernel: Move prctl and helpers from kernel/sys.c to new kernel/prctl.c > > kernel: Support compiling out the prctl syscall > > > > Both of these look really nice to me. Another syscall that comes to > mind as a candidate to be made optional is ptrace, and I've added > Nicolas Pitre to Cc here, as he has looked into this before. I've looked at that as well; it's a rather more complex patch, as several other bits of the kernel hook into ptrace or otherwise depend on ptrace. (And ptrace_may_access will need to stick around even when ptrace doesn't.) - Josh Triplett -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
