BPLATFORM(IOS) always evaluates to false regardless of whether we are building bmalloc for iOS. Moreover, BPLATFORM(X) always evaluates to false for any X.
Created attachment 236452 [details]
The patch for bug #131658 defined BPLATFORM(X) as (defined BPLATFORM_##PLATFORM && PLATFORM_##PLATFORM).
Notice that the second conjunct is PLATFORM_##PLATFORM. But it should be BPLATFORM_##PLATFORM. Otherwise BPLATFORM(X) will always evaluate to false for any X since PLATFORM_X is undefined for any X and an undefined macro value evaluates to false in a boolean context.
Comment on attachment 236452 [details]
For completeness, with the proposed change iOS will use 16kB pages instead of 4kb pages.
Committed r172510: <http://trac.webkit.org/changeset/172510>