c6x: switch to ->regset_get()

[linux-2.6-microblaze.git] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index e3490ec..f2104cc 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -133,6 +133,9 @@ config HAVE_FAST_GUP
        depends on MMU
        bool
 
+# Don't discard allocated memory used to track "memory" and "reserved" memblocks
+# after early boot, so it can still be used to test for validity of memory.
+# Also, memblocks are updated with memory hot(un)plug.
 config ARCH_KEEP_MEMBLOCK
        bool
 
@@ -155,6 +158,7 @@ config MEMORY_HOTPLUG
        bool "Allow for memory hot-add"
        depends on SPARSEMEM || X86_64_ACPI_NUMA
        depends on ARCH_ENABLE_MEMORY_HOTPLUG
+       depends on 64BIT || BROKEN
        select NUMA_KEEP_MEMINFO if NUMA
 
 config MEMORY_HOTPLUG_SPARSE
@@ -189,6 +193,9 @@ config MEMORY_HOTREMOVE
 # Default to 4 for wider testing, though 8 might be more appropriate.
 # ARM's adjust_pte (unused if VIPT) depends on mm-wide page_table_lock.
 # PA-RISC 7xxx's spinlock_t would enlarge struct page from 32 to 44 bytes.
+# SPARC32 allocates multiple pte tables within a single page, and therefore
+# a per-page lock leads to problems when multiple tables need to be locked
+# at the same time (e.g. copy_page_range()).
 # DEBUG_SPINLOCK and DEBUG_LOCK_ALLOC spinlock_t also enlarge struct page.
 #
 config SPLIT_PTLOCK_CPUS
@@ -196,6 +203,7 @@ config SPLIT_PTLOCK_CPUS
        default "999999" if !MMU
        default "999999" if ARM && !CPU_CACHE_VIPT
        default "999999" if PARISC && !PA20
+       default "999999" if SPARC32
        default "4"
 
 config ARCH_ENABLE_SPLIT_PMD_PTLOCK