[Xen-devel] [PATCH] x86_64 linux: don't use USER_PTRS_PER_PGD in mm_walk()

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

Since USER_PTRS_PER_PGD depends on TASK_SIZE and thus on the current thread, it 
must not be used in code that can be
called in the context switch path (otherwise the 32-bitness of the outgoing 
task is used here rather then the 32-bitness
of the incoming one, possibly resulting in large parts of the page tables not 
getting converted to read-only).

Jan

Attachment: xenlinux-x86_64-mm_walk.patch
Description: Text document

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