From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 17 Nov 2011 04:59:28 +0000 (-0500)
Subject: fix issue with excessive mremap syscalls on realloc
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;ds=inline;h=e5d78fe8df9bd61940abcd98ad07ed69b7da4350;hp=e5d78fe8df9bd61940abcd98ad07ed69b7da4350;p=musl

fix issue with excessive mremap syscalls on realloc

CHUNK_SIZE macro was defined incorrectly and shaving off at least one
significant bit in the size of mmapped chunks, resulting in the test
for oldlen==newlen always failing and incurring a syscall. fortunately
i don't think this issue caused any other observable behavior; the
definition worked correctly for all non-mmapped chunks where its
correctness matters more, since their lengths are always multiples of
the alignment.
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