mm, vmalloc: cleanup for vmap block

This patchset is a cleanup for vmap block. And similar/same patches has been submitted before:
- Johannes Weiner's patch: https://lkml.org/lkml/2011/4/14/619
- Chanho Min's patch: https://lkml.org/lkml/2013/2/6/810

In Johannes's thread, Mel suggested to figure out if this bitmap was not supposed to be doing something useful and depending on that implement recycling of partially used vmap blocks.

Anyway, just as Johannes said, we shouldn't leave these dead/unused code as is, because it really is a waste of time for cpus and readers of the code. And this cleanup doesn't prevent anyone from improving the algorithm later on.

Based on the two patches before, I split the cleanup into three small pieces that may be more clear.

Zhang Yanfei (3):
mm, vmalloc: Remove dead code in vb_alloc
mm, vmalloc: Remove unused purge_fragmented_blocks_thiscpu mm, vmalloc: Remove alloc_map from vmap_block

 mm/vmalloc.c |   24 +-----------------------
 1 files changed, 1 insertions(+), 23 deletions(-)

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