On Tue, 13 Mar 2012 14:36:54 -0700, Andrew Morton [off-list ref] wrote:

On Tue, 13 Mar 2012 12:37:07 +0530
"Aneesh Kumar K.V" [off-list ref] wrote:

quoted

+		return ERR_PTR(-VM_FAULT_SIGBUS);

whee, so we have (ab)used the err.h infrastructure to carry
VM_FAULT_foo codes, thus creating a secret requirement that the
VM_FAULT_foo values not exceed MAX_ERRNO.

What a hack, whodidthat?

e0dcd8a05be438b3d2e49ef61441ea3a463663f8. We only do that in hugetlb. I
will add a cleanup patch that will return proper error and map them in
the caller to return SIGBUS.

-aneesh