shmem: Fix link error if huge pages support is disabled
If CONFIG_TRANSPARENT_HUGE_PAGECACHE=n, HPAGE_PMD_NR evaluates to BUILD_BUG_ON(), and may cause (e.g. with gcc 4.12): mm/built-in.o: In function `shmem_alloc_hugepage': shmem.c:(.text+0x17570): undefined reference to `__compiletime_assert_1365' To fix this, move the assignment to hindex after the check for huge pages support. Fixes: 800d8c63 ("shmem: add huge pages support") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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