MIPS: Fix possible build error with transparent hugepages enabled

If CONFIG_TRANSPARENT_HUGEPAGE is enabled, but CONFIG_HUGETLB_PAGE is not,
it is possible to end up with a configuration that fails to build with the
following error:

include/linux/huge_mm.h:125:2: error: #error "hugepages can't be allocated by the buddy allocator"

This is due to CONFIG_FORCE_MAX_ZONEORDER defaulting to 11. It already has
ranges that change the valid values when HUGETLB_PAGE is enabled, but this
is not done for TRANSPARENT_HUGEPAGE. Fix by changing the HUGETLB_PAGE
dependencies to MIPS_HUGE_TLB_SUPPORT, which includes both
TRANSPARENT_HUGEPAGE and HUGETLB_PAGE.

Signed-off-by: Alex Smith <alex.smith@imgtec.com>
Reviewed-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6391/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 153447452d5e9f368b044a1747f35dc456c1cc5f..95fa1f1d5c8b4a70d3ee991e7a5bb32b5db22740 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1776,12 +1776,12 @@ endchoice
 
 config FORCE_MAX_ZONEORDER
        int "Maximum zone order"
-       range 14 64 if HUGETLB_PAGE && PAGE_SIZE_64KB
-       default "14" if HUGETLB_PAGE && PAGE_SIZE_64KB
-       range 13 64 if HUGETLB_PAGE && PAGE_SIZE_32KB
-       default "13" if HUGETLB_PAGE && PAGE_SIZE_32KB
-       range 12 64 if HUGETLB_PAGE && PAGE_SIZE_16KB
-       default "12" if HUGETLB_PAGE && PAGE_SIZE_16KB
+       range 14 64 if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_64KB
+       default "14" if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_64KB
+       range 13 64 if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_32KB
+       default "13" if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_32KB
+       range 12 64 if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_16KB
+       default "12" if MIPS_HUGE_TLB_SUPPORT && PAGE_SIZE_16KB
        range 11 64
        default "11"
        help