From: Tom Hromatka <tom.hromatka@xxxxxxxxxx>
Date: Fri, 31 Mar 2017 16:31:42 -0600
> This commit moves sparc64's prototype of pmd_write() outside
> of the CONFIG_TRANSPARENT_HUGEPAGE ifdef.
>
> In 2013, commit a7b9403f0e6d ("sparc64: Encode huge PMDs using PTE
> encoding.") exposed a path where pmd_write() could be called without
> CONFIG_TRANSPARENT_HUGEPAGE defined. This can result in the panic below.
>
> The diff is awkward to read, but the changes are straightforward.
> pmd_write() was moved outside of #ifdef CONFIG_TRANSPARENT_HUGEPAGE.
> Also, __HAVE_ARCH_PMD_WRITE was defined.
>
> kernel BUG at include/asm-generic/pgtable.h:576!
...
> Signed-off-by: Tom Hromatka <tom.hromatka@xxxxxxxxxx>
Applied.
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