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author	zhong jiang <zhongjiang@huawei.com>	2017-01-24 15:18:52 -0800
committer	Linus Torvalds <torvalds@linux-foundation.org>	2017-01-24 16:26:14 -0800
commit	3277953de2f31dd03c6375e9a9f680ac37fc9d27 (patch)
tree	6ba22924faa1b82ef2f0277db10a3f5abdc44157 /include/trace/events/udp.h
parent	3705ccfdd1e8b539225ce20e3925a945cc788d67 (diff)

mm: do not export ioremap_page_range symbol for external module

Recently, I've found cases in which ioremap_page_range was used incorrectly, in external modules, leading to crashes. This can be partly attributed to the fact that ioremap_page_range is lower-level, with fewer protections, as compared to the other functions that an external module would typically call. Those include: ioremap_cache ioremap_nocache ioremap_prot ioremap_uc ioremap_wc ioremap_wt ...each of which wraps __ioremap_caller, which in turn provides a safer way to achieve the mapping. Therefore, stop EXPORT-ing ioremap_page_range. Link: http://lkml.kernel.org/r/1485173220-29010-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang <zhongjiang@huawei.com> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Suggested-by: John Hubbard <jhubbard@nvidia.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Diffstat (limited to 'include/trace/events/udp.h')


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