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Message-id: <e544d6d0ade54cc62dd30b95cc19c62bb136af60.1223706853.git.len.brown@intel.com>
Date: Sat, 11 Oct 2008 02:36:04 -0400
From: Len Brown <lenb@...nel.org>
To: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Alexey Starikovskiy <astarikovskiy@...e.de>,
Len Brown <len.brown@...el.com>
Subject: [PATCH 44/85] ACPICA: add preemption point after each opcode parse
From: Alexey Starikovskiy <astarikovskiy@...e.de>
Reference: http://marc.info/?l=linux-acpi&m=122236382701062&w=2
Signed-off-by: Alexey Starikovskiy <astarikovskiy@...e.de>
Tested-by: Sitsofe Wheeler <sitsofe@...oo.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
drivers/acpi/parser/psloop.c | 2 ++
include/acpi/acmacros.h | 5 +++++
include/acpi/platform/aclinux.h | 6 ++++++
3 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/parser/psloop.c b/drivers/acpi/parser/psloop.c
index c06238e..4647039 100644
--- a/drivers/acpi/parser/psloop.c
+++ b/drivers/acpi/parser/psloop.c
@@ -719,6 +719,8 @@ acpi_ps_complete_op(struct acpi_walk_state *walk_state,
*op = NULL;
}
+ ACPI_PREEMPTION_POINT();
+
return_ACPI_STATUS(AE_OK);
}
diff --git a/include/acpi/acmacros.h b/include/acpi/acmacros.h
index 57ab9e9..b402685 100644
--- a/include/acpi/acmacros.h
+++ b/include/acpi/acmacros.h
@@ -703,4 +703,9 @@ struct acpi_integer_overlay {
#endif /* ACPI_DBG_TRACK_ALLOCATIONS */
+/* Preemption point */
+#ifndef ACPI_PREEMPTION_POINT
+#define ACPI_PREEMPTION_POINT() /* no preemption */
+#endif
+
#endif /* ACMACROS_H */
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 9af4645..029c8c0 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -53,6 +53,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/ctype.h>
+#include <linux/sched.h>
#include <asm/system.h>
#include <asm/atomic.h>
#include <asm/div64.h>
@@ -137,4 +138,9 @@ static inline void *acpi_os_acquire_object(acpi_cache_t * cache)
#define ACPI_ALLOCATE_ZEROED(a) acpi_os_allocate_zeroed(a)
#define ACPI_FREE(a) kfree(a)
+/*
+ * We need to show where it is safe to preempt execution of ACPICA
+ */
+#define ACPI_PREEMPTION_POINT() cond_resched()
+
#endif /* __ACLINUX_H__ */
--
1.5.5.1
--
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