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authorHuang Ying <ying.huang@intel.com>2011-01-12 14:44:55 +0800
committerLen Brown <len.brown@intel.com>2011-01-12 03:06:19 -0500
commit81e88fdc432a1552401d6e91a984dcccce72b8dc (patch)
tree41ef511cda7ddf6b96f8d923ffceff74651a5790 /lib
parent32c361f574f85fa47600d84900598e2efc99082e (diff)
downloadlinux-linaro-android-81e88fdc432a1552401d6e91a984dcccce72b8dc.tar.gz
ACPI, APEI, Generic Hardware Error Source POLL/IRQ/NMI notification type support
Generic Hardware Error Source provides a way to report platform hardware errors (such as that from chipset). It works in so called "Firmware First" mode, that is, hardware errors are reported to firmware firstly, then reported to Linux by firmware. This way, some non-standard hardware error registers or non-standard hardware link can be checked by firmware to produce more valuable hardware error information for Linux. This patch adds POLL/IRQ/NMI notification types support. Because the memory area used to transfer hardware error information from BIOS to Linux can be determined only in NMI, IRQ or timer handler, but general ioremap can not be used in atomic context, so a special version of atomic ioremap is implemented for that. Known issue: - Error information can not be printed for recoverable errors notified via NMI, because printk is not NMI-safe. Will fix this via delay printing to IRQ context via irq_work or make printk NMI-safe. v2: - adjust printk format per comments. Signed-off-by: Huang Ying <ying.huang@intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/ioremap.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/ioremap.c b/lib/ioremap.c
index 5730ecd3eb6..da4e2ad74b6 100644
--- a/lib/ioremap.c
+++ b/lib/ioremap.c
@@ -9,6 +9,7 @@
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/io.h>
+#include <linux/module.h>
#include <asm/cacheflush.h>
#include <asm/pgtable.h>
@@ -90,3 +91,4 @@ int ioremap_page_range(unsigned long addr,
return err;
}
+EXPORT_SYMBOL_GPL(ioremap_page_range);