ARM: LLVMLinux: Change "extern inline" to "static inline" in glue-cache.h

With compilers which follow the C99 standard (like modern versions of gcc and
clang), "extern inline" does the wrong thing (emits code for an externally
linkable version of the inline function). "static inline" is the correct choice
instead.

Author: Behan Webster <behanw@converseincode.com>
Signed-off-by: Behan Webster <behanw@converseincode.com>
Reviewed-by: Mark Charlebois <charlebm@gmail.com>

Conflicts:
	arch/arm/include/asm/glue-cache.h
arm, unwind, LLVMLinux: Enable clang to be used for unwinding the stack

Patch to prevent warning of a buggy compiler when using clang and
the ARM_UNWIND option.

Clang defines (at least on the current trunk) GNUC, GNUC_MINOR, and
GNUC_PATCHLEVEL to 4, 2, and 1 respectively.

This version of GCC gets flagged as buggy, but it isn't actually an
issue with clang so the patch will do what it did before unless clang
is defined and then it will not report the GCC version as an issue.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: Behan Webster <behanw@converseincode.com>
Makefile: Fix unrecognized cross-compiler command line options
On architectures that setup CROSS_COMPILE in their arch/*/Makefile (arc, blackfin, m68k, mips, parisc, score, sh, tile, unicore32, xtensa), cc-option and cc-disable-warning may check against the wrong compiler, causing errors like cc1: error: unrecognized command line option "-Wno-maybe-uninitialized" if the host gcc supports a compiler option, while the cross compiler doesn't support that option. Move all logic using cc-option or cc-disable-warning below the inclusion of the arch's Makefile to fix this. Introduced by - commit e74fc973b6e531fef1fce8b101ffff05ecfb774c ("Turn off -Wmaybe-uninitialized when building with -Os"), - commit 61163efae02040f66a95c8ed17f4407951ba58fa ("kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang"). As -Wno-maybe-uninitialized requires a quite recent gcc (gcc 4.6.3 on Ubuntu 12.04 LTS doesn't support it), this only showed up recently (gcc 4.8.2 on Ubuntu 14.04 LTS does support it). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Michal Marek <mmarek@suse.cz>