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(parent: 35418c3) | patch
powerpc/mm/hash: Check for non-kernel address in get_kernel_vsid()
authorMichael Ellerman <mpe@ellerman.id.au>
Wed, 29 Mar 2017 12:10:34 +0000 (23:10 +1100)
committerMichael Ellerman <mpe@ellerman.id.au>
Fri, 31 Mar 2017 12:09:59 +0000 (23:09 +1100)
commita4c2d0d3d773d6ca428caf0689209589c3c98e8c
treeda13f327c397a15d75ec0790bc143d9c790b4f23tree | snapshot
parent35418c3615c9d9a3400eb98b33a4d2b57b213750commit | diff
powerpc/mm/hash: Check for non-kernel address in get_kernel_vsid()

get_kernel_vsid() has a very stern comment saying that it's only valid
for kernel addresses, but there's nothing in the code to enforce that.

Rather than hoping our callers are well behaved, add a check and return
a VSID of 0 (invalid).

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/include/asm/book3s/64/mmu-hash.h diff | blob | history
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