summaryrefslogtreecommitdiffstats
path: root/include/asm-generic
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/Kbuild.asm2
-rw-r--r--include/asm-generic/atomic.h2
-rw-r--r--include/asm-generic/gpio.h6
-rw-r--r--include/asm-generic/pgtable.h57
-rw-r--r--include/asm-generic/vmlinux.lds.h14
5 files changed, 78 insertions, 3 deletions
diff --git a/include/asm-generic/Kbuild.asm b/include/asm-generic/Kbuild.asm
index 92a6d91d0c1..7cd25b8e7c9 100644
--- a/include/asm-generic/Kbuild.asm
+++ b/include/asm-generic/Kbuild.asm
@@ -1,6 +1,6 @@
header-y += kvm.h
-ifeq ($(wildcard include/asm-$(SRCARCH)/a.out.h),include/asm-$(SRCARCH)/a.out.h)
+ifneq ($(wildcard $(srctree)/include/asm-$(SRCARCH)/a.out.h),)
unifdef-y += a.out.h
endif
unifdef-y += auxvec.h
diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h
index 85fd0aa27a8..4ec0a296bde 100644
--- a/include/asm-generic/atomic.h
+++ b/include/asm-generic/atomic.h
@@ -2,7 +2,7 @@
#define _ASM_GENERIC_ATOMIC_H
/*
* Copyright (C) 2005 Silicon Graphics, Inc.
- * Christoph Lameter <clameter@sgi.com>
+ * Christoph Lameter
*
* Allows to provide arch independent atomic definitions without the need to
* edit all arch specific atomic.h files.
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index ecf675a59d2..6be061d09da 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -1,8 +1,12 @@
#ifndef _ASM_GENERIC_GPIO_H
#define _ASM_GENERIC_GPIO_H
+#include <linux/types.h>
+
#ifdef CONFIG_HAVE_GPIO_LIB
+#include <linux/compiler.h>
+
/* Platforms may implement their GPIO interface with library code,
* at a small performance cost for non-inlined operations and some
* extra memory (for code and for per-GPIO table entries).
@@ -74,7 +78,7 @@ struct gpio_chip {
extern const char *gpiochip_is_requested(struct gpio_chip *chip,
unsigned offset);
-extern int __init __must_check gpiochip_reserve(int start, int ngpio);
+extern int __must_check gpiochip_reserve(int start, int ngpio);
/* add/remove chips */
extern int gpiochip_add(struct gpio_chip *chip);
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 44ef329531c..4fce3db2cec 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -197,6 +197,63 @@ static inline int pmd_none_or_clear_bad(pmd_t *pmd)
}
#endif /* CONFIG_MMU */
+static inline pte_t __ptep_modify_prot_start(struct mm_struct *mm,
+ unsigned long addr,
+ pte_t *ptep)
+{
+ /*
+ * Get the current pte state, but zero it out to make it
+ * non-present, preventing the hardware from asynchronously
+ * updating it.
+ */
+ return ptep_get_and_clear(mm, addr, ptep);
+}
+
+static inline void __ptep_modify_prot_commit(struct mm_struct *mm,
+ unsigned long addr,
+ pte_t *ptep, pte_t pte)
+{
+ /*
+ * The pte is non-present, so there's no hardware state to
+ * preserve.
+ */
+ set_pte_at(mm, addr, ptep, pte);
+}
+
+#ifndef __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
+/*
+ * Start a pte protection read-modify-write transaction, which
+ * protects against asynchronous hardware modifications to the pte.
+ * The intention is not to prevent the hardware from making pte
+ * updates, but to prevent any updates it may make from being lost.
+ *
+ * This does not protect against other software modifications of the
+ * pte; the appropriate pte lock must be held over the transation.
+ *
+ * Note that this interface is intended to be batchable, meaning that
+ * ptep_modify_prot_commit may not actually update the pte, but merely
+ * queue the update to be done at some later time. The update must be
+ * actually committed before the pte lock is released, however.
+ */
+static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
+ unsigned long addr,
+ pte_t *ptep)
+{
+ return __ptep_modify_prot_start(mm, addr, ptep);
+}
+
+/*
+ * Commit an update to a pte, leaving any hardware-controlled bits in
+ * the PTE unmodified.
+ */
+static inline void ptep_modify_prot_commit(struct mm_struct *mm,
+ unsigned long addr,
+ pte_t *ptep, pte_t pte)
+{
+ __ptep_modify_prot_commit(mm, addr, ptep, pte);
+}
+#endif /* __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION */
+
/*
* A facility to provide lazy MMU batching. This allows PTE updates and
* page invalidations to be delayed until a call to leave lazy MMU mode
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index f054778e916..f1992dc5c42 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -93,6 +93,8 @@
VMLINUX_SYMBOL(__end_rio_route_ops) = .; \
} \
\
+ TRACEDATA \
+ \
/* Kernel symbol table: Normal symbols */ \
__ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start___ksymtab) = .; \
@@ -318,6 +320,18 @@
__stop___bug_table = .; \
}
+#ifdef CONFIG_PM_TRACE
+#define TRACEDATA \
+ . = ALIGN(4); \
+ .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
+ __tracedata_start = .; \
+ *(.tracedata) \
+ __tracedata_end = .; \
+ }
+#else
+#define TRACEDATA
+#endif
+
#define NOTES \
.notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start_notes) = .; \