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authorDan Williams <dan.j.williams@intel.com>2016-02-12 01:13:17 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2016-02-12 03:35:48 +0100
commitdb78c22230d0bcc8b27b81f05b39f104f08232c5 (patch)
treed5c99cc8df77b86bd9d88db6b24acbb4827a5023 /include/ras
parentkernel/locking/lockdep.c: convert hash tables to hlists (diff)
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mm: fix pfn_t vs highmem
The pfn_t type uses an unsigned long to store a pfn + flags value. On a 64-bit platform the upper 12 bits of an unsigned long are never used for storing the value of a pfn. However, this is not true on highmem platforms, all 32-bits of a pfn value are used to address a 44-bit physical address space. A pfn_t needs to store a 64-bit value. Link: https://bugzilla.kernel.org/show_bug.cgi?id=112211 Fixes: 01c8f1c44b83 ("mm, dax, gpu: convert vm_insert_mixed to pfn_t") Signed-off-by: Dan Williams <dan.j.williams@intel.com> Reported-by: Stuart Foster <smf.linux@ntlworld.com> Reported-by: Julian Margetson <runaway@candw.ms> Tested-by: Julian Margetson <runaway@candw.ms> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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