Patches submitted to the mailing list. [1] Marking this as confirmed since I confirmed Brian's report.
[1] https://lists.ubuntu.com/archives/kernel-team/2014-May/043098.html ** Changed in: linux (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1321791 Title: Warnings when building out-of-tree module with -Wsign-compare Status in “linux” package in Ubuntu: Confirmed Bug description: Bug originally reported and fixes provided by Brian Hart, IBM. Various warnings will be seen when building an out-of-tree module with -Wsign-compare if any of the following are included: include/linux/bitops.h include/linux/cpumask.h include/linux/fb.h Seen on post-release 14.04, with current kernel headers. Example... Makefile: ---------------------------------------- obj-m := sample.o EXTRA_CFLAGS = -Wsign-compare ---------------------------------------- sample.c: ---------------------------------------- #include <linux/init.h> #include <linux/module.h> #include <linux/bitops.h> #include <linux/cpumask.h> #include <linux/fb.h> MODULE_LICENSE("GPL"); static int sample_init(void) { printk(KERN_ALERT "sample init\n"); return 0; } static void sample_term(void) { printk(KERN_ALERT "sample term\n"); return; } module_init(sample_init) module_exit(sample_term) ---------------------------------------- $ ARCH=powerpc make -C /usr/src/linux-headers-`uname -r` M=`pwd` modules ... include/asm-generic/bitops/const_hweight.h:27:70: warning: signed and unsigned type in conditional expression [-Wsign-... .. include/linux/cpumask.h:603:26: warning: signed and unsigned type in conditional expression [-Wsign-compare] ... include/linux/fb.h:650:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] ... Fix: ----- upstream commits: - bitops.h: linux c32fa99f0b4252633aa464e28d1cb925bd2a79df - cpumask.h: linux-next cea092c9488cbb22c8b70336ab1413e0daf350f0 - fb.h: linux-next ee3468739ed83d862dbbd90397aff5258f8f2c8e Patches will be sent to the kernel-team mailing list. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1321791/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
