sh: Fix hugetlbfs dependencies for SH-3 && MMU configurations.

The hugetlb dependencies presently depend on SUPERH && MMU while the
hugetlb page size definitions depend on CPU_SH4 or CPU_SH5. This
unfortunately allows SH-3 + MMU configurations to enable hugetlbfs
without a corresponding HPAGE_SHIFT definition, resulting in the build
blowing up.

As SH-3 doesn't support variable page sizes, we tighten up the
dependenies a bit to prevent hugetlbfs from being enabled. These days
we also have a shiny new SYS_SUPPORTS_HUGETLBFS, so switch to using
that rather than adding to the list of corner cases in fs/Kconfig.

Reported-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 8 insertions, 3 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 0dc7e3cbeffa..88cdeb9f72d9 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -121,6 +121,9 @@ config SYS_SUPPORTS_APM_EMULATION
         bool
         select ARCH_SUSPEND_POSSIBLE
 
+config SYS_SUPPORTS_HUGETLBFS
+        bool
+
 config SYS_SUPPORTS_SMP
         bool
 
@@ -195,6 +198,7 @@ config CPU_SH4
         select CPU_HAS_SR_RB
         select CPU_HAS_FPU if !CPU_SH4AL_DSP
         select SYS_SUPPORTS_TMU
+        select SYS_SUPPORTS_HUGETLBFS if MMU
 
 config CPU_SH4A
         bool
@@ -209,6 +213,7 @@ config CPU_SH5
         bool
         select CPU_HAS_FPU
         select SYS_SUPPORTS_TMU
+        select SYS_SUPPORTS_HUGETLBFS if MMU
 
 config CPU_SHX2
         bool
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 64dc1ad59801..7f7b52f9beba 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -227,7 +227,7 @@ endchoice
 
 choice
         prompt "HugeTLB page size"
-        depends on HUGETLB_PAGE && (CPU_SH4 || CPU_SH5) && MMU
+        depends on HUGETLB_PAGE
         default HUGETLB_PAGE_SIZE_1MB if PAGE_SIZE_64KB
         default HUGETLB_PAGE_SIZE_64K
 
diff --git a/fs/Kconfig b/fs/Kconfig
index d4bf8caad8d0..48b81f92a50e 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -135,8 +135,8 @@ config TMPFS_POSIX_ACL
 
 config HUGETLBFS
         bool "HugeTLB file system support"
-        depends on X86 || IA64 || PPC64 || SPARC64 || (SUPERH && MMU) || \
-                   (S390 && 64BIT) || SYS_SUPPORTS_HUGETLBFS || BROKEN
+        depends on X86 || IA64 || PPC64 || SPARC64 || (S390 && 64BIT) || \
+                   SYS_SUPPORTS_HUGETLBFS || BROKEN
         help
           hugetlbfs is a filesystem backing for HugeTLB pages, based on
           ramfs. For architectures that support it, say Y here and read