4 files changed, 33 insertions, 9 deletions

diff --git a/include/asm-generic/fcntl.h b/include/asm-generic/fcntl.h
index 495dc8af4044..681ddf3e844c 100644
--- a/include/asm-generic/fcntl.h
+++ b/include/asm-generic/fcntl.h
@@ -3,8 +3,6 @@
 
 #include <linux/types.h>
 
-/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
-   located on an ext2 file system */
 #define O_ACCMODE       00000003
 #define O_RDONLY        00000000
 #define O_WRONLY        00000001
@@ -27,8 +25,8 @@
 #ifndef O_NONBLOCK
 #define O_NONBLOCK      00004000
 #endif
-#ifndef O_SYNC
-#define O_SYNC          00010000
+#ifndef O_DSYNC
+#define O_DSYNC         00010000        /* used to be O_SYNC, see below */
 #endif
 #ifndef FASYNC
 #define FASYNC          00020000        /* fcntl, for BSD compatibility */
@@ -51,6 +49,25 @@
 #ifndef O_CLOEXEC
 #define O_CLOEXEC       02000000        /* set close_on_exec */
 #endif
+
+/*
+ * Before Linux 2.6.32 only O_DSYNC semantics were implemented, but using
+ * the O_SYNC flag.  We continue to use the existing numerical value
+ * for O_DSYNC semantics now, but using the correct symbolic name for it.
+ * This new value is used to request true Posix O_SYNC semantics.  It is
+ * defined in this strange way to make sure applications compiled against
+ * new headers get at least O_DSYNC semantics on older kernels.
+ *
+ * This has the nice side-effect that we can simply test for O_DSYNC
+ * wherever we do not care if O_DSYNC or O_SYNC is used.
+ *
+ * Note: __O_SYNC must never be used directly.
+ */
+#ifndef O_SYNC
+#define __O_SYNC        04000000
+#define O_SYNC          (__O_SYNC|O_DSYNC)
+#endif
+
 #ifndef O_NDELAY
 #define O_NDELAY        O_NONBLOCK
 #endif
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 66d6106a2067..204bed37e82d 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -28,6 +28,7 @@ static inline int gpio_is_valid(int number)
         return ((unsigned)number) < ARCH_NR_GPIOS;
 }
 
+struct device;
 struct seq_file;
 struct module;
 
@@ -181,6 +182,8 @@ static inline void gpio_set_value_cansleep(unsigned gpio, int value)
 
 #ifndef CONFIG_GPIO_SYSFS
 
+struct device;
+
 /* sysfs support is only available with gpiolib, where it's optional */
 
 static inline int gpio_export(unsigned gpio, bool direction_may_change)
diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
index 4c8d0afae711..fb2d63f13f4c 100644
--- a/include/asm-generic/memory_model.h
+++ b/include/asm-generic/memory_model.h
@@ -47,7 +47,7 @@
 
 #elif defined(CONFIG_SPARSEMEM_VMEMMAP)
 
-/* memmap is virtually contigious.  */
+/* memmap is virtually contiguous.  */
 #define __pfn_to_page(pfn)      (vmemmap + (pfn))
 #define __page_to_pfn(page)     (unsigned long)((page) - vmemmap)
 
diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h
index d76b66acea95..6a0b30f78a62 100644
--- a/include/asm-generic/unistd.h
+++ b/include/asm-generic/unistd.h
@@ -622,16 +622,20 @@ __SYSCALL(__NR_move_pages, sys_move_pages)
 __SYSCALL(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo)
 #define __NR_perf_event_open 241
 __SYSCALL(__NR_perf_event_open, sys_perf_event_open)
+#define __NR_accept4 242
+__SYSCALL(__NR_accept4, sys_accept4)
+#define __NR_recvmmsg 243
+__SYSCALL(__NR_recvmmsg, sys_recvmmsg)
 
 #undef __NR_syscalls
-#define __NR_syscalls 242
+#define __NR_syscalls 244
 
 /*
  * All syscalls below here should go away really,
  * these are provided for both review and as a porting
  * help for the C library version.
 *
- * Last chance: are any of these important enought to
+ * Last chance: are any of these important enough to
  * enable by default?
  */
 #ifdef __ARCH_WANT_SYSCALL_NO_AT
@@ -802,7 +806,7 @@ __SYSCALL(__NR_fork, sys_ni_syscall)
 #define __NR_statfs __NR3264_statfs
 #define __NR_fstatfs __NR3264_fstatfs
 #define __NR_truncate __NR3264_truncate
-#define __NR_ftruncate __NR3264_truncate
+#define __NR_ftruncate __NR3264_ftruncate
 #define __NR_lseek __NR3264_lseek
 #define __NR_sendfile __NR3264_sendfile
 #define __NR_newfstatat __NR3264_fstatat
@@ -818,7 +822,7 @@ __SYSCALL(__NR_fork, sys_ni_syscall)
 #define __NR_statfs64 __NR3264_statfs
 #define __NR_fstatfs64 __NR3264_fstatfs
 #define __NR_truncate64 __NR3264_truncate
-#define __NR_ftruncate64 __NR3264_truncate
+#define __NR_ftruncate64 __NR3264_ftruncate
 #define __NR_llseek __NR3264_lseek
 #define __NR_sendfile64 __NR3264_sendfile
 #define __NR_fstatat64 __NR3264_fstatat