kernel.git/arch/powerpc/Makefile, branch linux-4.8.y

powerpc/Makefile: Use cflags-y/aflags-y for setting endian options

2016-08-10T13:01:53Z

When we introduced the little endian support, we added the endian flags to CC directly using override. I don't know the history of why we did that, I suspect no one does. Although this mostly works, it has one bug, which is that CROSS32CC doesn't get -mbig-endian. That means when the compiler is little endian by default and the user is building big endian, vdso32 is incorrectly compiled as little endian and the kernel fails to build. Instead we can add the endian flags to cflags-y/aflags-y, and then append those to KBUILD_CFLAGS/KBUILD_AFLAGS. This has the advantage of being 1) less ugly, 2) the documented way of adding flags in the arch Makefile and 3) it fixes building vdso32 with a LE toolchain. Signed-off-by: Michael Ellerman

powerpc/sparse: Pass endianness to sparse

2016-07-14T10:44:03Z

Explicitly give sparse an endianness in the Makefile, so that it doesn't get confused. Normally we have #ifdef one and #else the other, so it doesn't usually matter, but we have been bitten by it before, and indeed this patch fixes a number of sparse errors. Suggested-by: Arnd Bergmann Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman

powerpc: Avoid -maltivec when using clang integrated assembler

2016-07-05T13:58:53Z

Check the assembler supports -maltivec by wrapping it with call as-option. Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next

2016-03-14T09:05:14Z

Freescale updates from Scott: "Highlights include 8xx optimizations, 32-bit checksum optimizations, 86xx consolidation, e5500/e6500 cpu hotplug, more fman and other dt bits, and minor fixes/cleanup."

powerpc/86xx: Switch to kconfig fragments approach

2016-03-12T01:19:12Z

Signed-off-by: Alessio Igor Bogani Signed-off-by: Scott Wood

powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel

2016-03-07T03:53:56Z

Firstly we add logic to Kconfig to allow a user to choose if they want mprofile-kernel. This has to be user-selectable because only some current toolchains support it. If we enabled it unconditionally we would prevent some users from building the kernel entirely. Arguably it would be nice if we could detect if mprofile-kernel was available, and use it then. However that would violate the principle of least surprise because a user having choosen options such as live patching, would then see them quietly disabled at build time. We also make the user selectable option negative, ie. it disables when selected, so that allyesconfig continues to build on old toolchains. Once we've decided we do want to use mprofile-kernel, we then add a script which checks it actually works. That is because there are versions of gcc that accept the flag but don't generate correct code. Due to the way kconfig works, we can't error out when we detect a non-working toolchain. If we did a user would never be able to modify their config and run oldconfig - because the check would block oldconfig from running. Instead we emit a warning and add a bogus flag to CFLAGS so that the build will fail. Signed-off-by: Torsten Duwe Signed-off-by: Michael Ellerman

powerpc/cell: Drop CONFIG_TUNE_CELL in favour of CONFIG_CELL_CPU

2015-10-19T08:51:18Z

The TUNE_CELL option allows you to build a kernel that runs on multiple CPUs but is tuned (ie. optimised) to run on Cell CPUs. Now days no one is building a distro in that fashion, and any users who are building custom kernels for their Cell machines are better off building with CONFIG_CELL_CPU, which builds a kernel that only runs on Cell and therefore can be optimised even more aggresively. Dropping the option also avoids confusing other users, who are presented with an option to tune for Cell when they are not building for a Cell CPU at all. Suggested-by: Thomas Huth Signed-off-by: Michael Ellerman

powerpc: Add ppc64le_defconfig

2015-10-01T06:52:03Z

Based directly on ppc64_defconfig using merge_config. Signed-off-by: Michael Ellerman

Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

2015-09-08T21:12:19Z

Pull core kbuild updates from Michal Marek: - modpost portability fix - linker script fix - genksyms segfault fix - fixdep cleanup - fix for clang detection * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kbuild: Fix clang detection kbuild: fixdep: drop meaningless hash table initialization kbuild: fixdep: optimize code slightly genksyms: Regenerate parser genksyms: Duplicate function pointer type definitions segfault kbuild: Fix .text.unlikely placement Avoid conflict with host definitions when cross-compiling

kbuild: Fix clang detection

2015-09-04T11:14:10Z

We cannot detect clang before including the arch Makefile, because that can set the default cross compiler. We also cannot detect clang after including the arch Makefile, because powerpc wants to know about clang. Solve this by using an deferred variable. This costs us a few shell invocations, but this is only a constant number. Reported-by: Behan Webster Reported-by: Anton Blanchard Signed-off-by: Michal Marek