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Barry Song authored
Patch series "mm: fix the names of general cma and hugetlb cma", v2. The current code of CMA can only work when users pass a const string as name parameter. we need to fix the way to handle names in CMA. On the other hand, to avoid name conflicts after enabling CMA_DEBUGFS, each hugetlb should get a different CMA name. This patch (of 2): If users give a name saved in stack, the current code will generate magic pointer. if users don't give a name(NULL), kasprintf() will always return NULL as we are at the early stage. that means cma_init_reserved_mem() will return -ENOMEM if users set name parameter as NULL. [natechancellor@gmail.com: return cma->name directly in cma_get_name] Link: https://github.com/ClangBuiltLinux/linux/issues/1063 Link: http://lkml.kernel.org/r/20200623015840.621964-1-natechancellor@gmail.comSigned-off-by:
Barry Song <song.bao.hua@hisilicon.com> Signed-off-by:
Nathan Chancellor <natechancellor@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Reviewed-by:
Mike Kravetz <mike.kravetz@oracle.com> Acked-by:
Roman Gushchin <guro@fb.com> Link: http://lkml.kernel.org/r/20200616223131.33828-2-song.bao.hua@hisilicon.comSigned-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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