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authorLinus Torvalds <torvalds@linux-foundation.org>2012-06-15 16:52:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-06-15 16:52:35 -0700
commita95f9b6e092ed862278e08266207c7ab231076b4 (patch)
treec5daf86ce89b3033c051dfc7b2955981d6add16d /mm
parentMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending (diff)
parentMerge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/urgent (diff)
downloadlinux-dev-a95f9b6e092ed862278e08266207c7ab231076b4.tar.xz
linux-dev-a95f9b6e092ed862278e08266207c7ab231076b4.zip
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core updates (RCU and locking) from Ingo Molnar: "Most of the diffstat comes from the RCU slow boot regression fixes, but there's also a debuggability improvements/fixes." * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: memblock: Document memblock_is_region_{memory,reserved}() rcu: Precompute RCU_FAST_NO_HZ timer offsets rcu: Move RCU_FAST_NO_HZ per-CPU variables to rcu_dynticks structure rcu: Update RCU_FAST_NO_HZ tracing for lazy callbacks rcu: RCU_FAST_NO_HZ detection of callback adoption spinlock: Indicate that a lockup is only suspected kdump: Execute kmsg_dump(KMSG_DUMP_PANIC) after smp_send_stop() panic: Make panic_on_oops configurable
Diffstat (limited to 'mm')
-rw-r--r--mm/memblock.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index 952123eba433..32a0a5e4d79d 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -867,6 +867,16 @@ int __init_memblock memblock_is_memory(phys_addr_t addr)
return memblock_search(&memblock.memory, addr) != -1;
}
+/**
+ * memblock_is_region_memory - check if a region is a subset of memory
+ * @base: base of region to check
+ * @size: size of region to check
+ *
+ * Check if the region [@base, @base+@size) is a subset of a memory block.
+ *
+ * RETURNS:
+ * 0 if false, non-zero if true
+ */
int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size)
{
int idx = memblock_search(&memblock.memory, base);
@@ -879,6 +889,16 @@ int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size
memblock.memory.regions[idx].size) >= end;
}
+/**
+ * memblock_is_region_reserved - check if a region intersects reserved memory
+ * @base: base of region to check
+ * @size: size of region to check
+ *
+ * Check if the region [@base, @base+@size) intersects a reserved memory block.
+ *
+ * RETURNS:
+ * 0 if false, non-zero if true
+ */
int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size)
{
memblock_cap_size(base, &size);