Fix up the "generic" unistd.h ABI to be more useful.
Reserve 16 "architecture-specific" syscall numbers starting at 244.
Allow use of the sys_sync_file_range2() API with the generic unistd.h
by specifying __ARCH_WANT_SYNC_FILE_RANGE2 before including it.
Allow using the generic unistd.h to create the "compat" syscall table
by specifying __SYSCALL_COMPAT before including it.
Use sys_fadvise64_64 for __NR3264_fadvise64 in both 32- and 64-bit mode.
Request the appropriate __ARCH_WANT_COMPAT_SYS_xxx values when
some deprecated syscall modes are selected.
As part of this change to fix up the syscalls, also provide a couple
of missing signal-related syscall prototypes in <linux/syscalls.h>.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h
index 6a0b30f..30218b4 100644
--- a/include/asm-generic/unistd.h
+++ b/include/asm-generic/unistd.h
@@ -18,7 +18,7 @@
#define __SYSCALL(x, y)
#endif
-#if __BITS_PER_LONG == 32
+#if __BITS_PER_LONG == 32 || defined(__SYSCALL_COMPAT)
#define __SC_3264(_nr, _32, _64) __SYSCALL(_nr, _32)
#else
#define __SC_3264(_nr, _32, _64) __SYSCALL(_nr, _64)
@@ -241,8 +241,13 @@
__SYSCALL(__NR_fsync, sys_fsync)
#define __NR_fdatasync 83
__SYSCALL(__NR_fdatasync, sys_fdatasync)
+#ifdef __ARCH_WANT_SYNC_FILE_RANGE2
+#define __NR_sync_file_range2 84
+__SYSCALL(__NR_sync_file_range2, sys_sync_file_range2)
+#else
#define __NR_sync_file_range 84
-__SYSCALL(__NR_sync_file_range, sys_sync_file_range) /* .long sys_sync_file_range2, */
+__SYSCALL(__NR_sync_file_range, sys_sync_file_range)
+#endif
/* fs/timerfd.c */
#define __NR_timerfd_create 85
@@ -580,7 +585,7 @@
__SC_3264(__NR3264_mmap, sys_mmap2, sys_mmap)
/* mm/fadvise.c */
#define __NR3264_fadvise64 223
-__SC_3264(__NR3264_fadvise64, sys_fadvise64_64, sys_fadvise64)
+__SYSCALL(__NR3264_fadvise64, sys_fadvise64_64)
/* mm/, CONFIG_MMU only */
#ifndef __ARCH_NOMMU
@@ -627,8 +632,14 @@
#define __NR_recvmmsg 243
__SYSCALL(__NR_recvmmsg, sys_recvmmsg)
+/*
+ * Architectures may provide up to 16 syscalls of their own
+ * starting with this value.
+ */
+#define __NR_arch_specific_syscall 244
+
#undef __NR_syscalls
-#define __NR_syscalls 244
+#define __NR_syscalls 260
/*
* All syscalls below here should go away really,
@@ -694,7 +705,8 @@
#define __NR_syscalls (__NR_signalfd+1)
#endif /* __ARCH_WANT_SYSCALL_NO_FLAGS */
-#if __BITS_PER_LONG == 32 && defined(__ARCH_WANT_SYSCALL_OFF_T)
+#if (__BITS_PER_LONG == 32 || defined(__SYSCALL_COMPAT)) && \
+ defined(__ARCH_WANT_SYSCALL_OFF_T)
#define __NR_sendfile 1046
__SYSCALL(__NR_sendfile, sys_sendfile)
#define __NR_ftruncate 1047
@@ -740,6 +752,7 @@
__SYSCALL(__NR_pause, sys_pause)
#define __NR_time 1062
#define __ARCH_WANT_SYS_TIME
+#define __ARCH_WANT_COMPAT_SYS_TIME
__SYSCALL(__NR_time, sys_time)
#define __NR_utime 1063
#define __ARCH_WANT_SYS_UTIME
@@ -801,7 +814,7 @@
* Here we map the numbers so that both versions
* use the same syscall table layout.
*/
-#if __BITS_PER_LONG == 64
+#if __BITS_PER_LONG == 64 && !defined(__SYSCALL_COMPAT)
#define __NR_fcntl __NR3264_fcntl
#define __NR_statfs __NR3264_statfs
#define __NR_fstatfs __NR3264_fstatfs
@@ -848,6 +861,7 @@
#endif
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
/*
* "Conditional" syscalls