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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2009-09-22 19:45:46 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 10:39:41 -0400
commit908eedc6168bd92e89f90d89fa389065a36358fa (patch)
tree612881abb2aae920ab1e62e88990ee7b6a988f51 /drivers/net
parent9492587cf35d370db33ef4b38375dfb35a105b61 (diff)
walk system ram range
Originally, walk_memory_resource() was introduced to traverse all memory of "System RAM" for detecting memory hotplug/unplug range. For doing so, flags of IORESOUCE_MEM|IORESOURCE_BUSY was used and this was enough for memory hotplug. But for using other purpose, /proc/kcore, this may includes some firmware area marked as IORESOURCE_BUSY | IORESOUCE_MEM. This patch makes the check strict to find out busy "System RAM". Note: PPC64 keeps their own walk_memory_resouce(), which walk through ppc64's lmb informaton. Because old kclist_add() is called per lmb, this patch makes no difference in behavior, finally. And this patch removes CONFIG_MEMORY_HOTPLUG check from this function. Because pfn_valid() just show "there is memmap or not* and cannot be used for "there is physical memory or not", this function is useful in generic to scan physical memory range. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: WANG Cong <xiyou.wangcong@gmail.com> Cc: Américo Wang <xiyou.wangcong@gmail.com> Cc: David Rientjes <rientjes@google.com> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ehea/ehea_qmr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ehea/ehea_qmr.c b/drivers/net/ehea/ehea_qmr.c
index 3747457f5e69..bc7c5b7abb88 100644
--- a/drivers/net/ehea/ehea_qmr.c
+++ b/drivers/net/ehea/ehea_qmr.c
@@ -751,7 +751,7 @@ int ehea_create_busmap(void)
751 751
752 mutex_lock(&ehea_busmap_mutex); 752 mutex_lock(&ehea_busmap_mutex);
753 ehea_mr_len = 0; 753 ehea_mr_len = 0;
754 ret = walk_memory_resource(0, 1ULL << MAX_PHYSMEM_BITS, NULL, 754 ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL,
755 ehea_create_busmap_callback); 755 ehea_create_busmap_callback);
756 mutex_unlock(&ehea_busmap_mutex); 756 mutex_unlock(&ehea_busmap_mutex);
757 return ret; 757 return ret;