next-20151126 build: 3 failures 15 warnings (next-20151126)

[Mark Brown]

On Thu, Nov 26, 2015 at 09:06:25AM +0000, Build bot for Mark Brown wrote:

Today's -next fails to build an arm64 allnoconfig due to:

> 	arm64-allnoconfig
> ../arch/arm64/mm/mmap.c:55:49: error: 'mmap_rnd_compat_bits' undeclared (first use in this function)

which was introduced by a combination of 8f62c06c279a3 (mm: mmap: add
new /proc tunable for mmap_base ASLR) and 9411708692954 (arm64: mm:
support ARCH_MMAP_RND_BITS).  These add an unconditional use of
mmap_rnd_compat_bits which is only defined in linux/mmap.h if
HAVE_ARCH_MMAP_RND_COMPAT_BITS is selected but that is only enabled for
arm64 if COMPAT is enabled.  Either the select needs to be unconditional
or the use needs to be.
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