tree 1c2771372fc23c55dd678080aa6529c98f8de371
parent a2b6bf63cb7a3e34bd2e753a6f2c2776b5c8496f
author Chris Wilson <chris@chris-wilson.co.uk> 1280354342 +0100
committer Catalin Marinas <catalin.marinas@arm.com> 1280354342 +0100

lib/scatterlist: Hook sg_kmalloc into kmemleak (v2)

kmemleak ignores page_alloc() and so believes the final sub-page
allocation using the plain kmalloc is decoupled and lost. This leads to
lots of false-positives with code that uses scatterlists.

The options seem to be either to tell kmemleak that the kmalloc is not
leaked or to notify kmemleak of the page allocations. The danger of the
first approach is that we may hide a real leak, so choose the latter
approach (of which I am not sure of the downsides).

v2: Added comments on the suggestion of Catalin.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>