3e7cb27cdd
vm_map_madvise(). Previously, vm_map_madvise() used a traditional Unix- style "return (0);" to indicate success in the common case, but Mach- style return values in the edge cases. Since KERN_SUCCESS equals zero, the only problem with this inconsistency was stylistic. vm_map_madvise() has exactly two callers in the entire source tree, and only one of them cares about the return value. That caller, kern_madvise(), can be simplified if vm_map_madvise() consistently uses Unix-style return values. Since vm_map_madvise() uses the variable modify_map as a Boolean, make it one. Eliminate a redundant error check from kern_madvise(). Add a comment explaining where the check is performed. Explicitly note that exec_release_args_kva() doesn't care about vm_map_madvise()'s return value. Since MADV_FREE is passed as the behavior, the return value will always be zero. Reviewed by: kib, markj MFC after: 7 days
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