posix_types: Introduce __kernel_[u]long_t

Introduce __kernel_[u]long_t, which allows an ABI to override all
defaults of type [unsigned] long.

This enables x32 and potentially other 32-bit userspace on 64-bit
kernel ABIs.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/include/asm-generic/posix_types.h b/include/asm-generic/posix_types.h
index e294fe6..91d44bd 100644 (file)
--- a/include/asm-generic/posix_types.h
+++ b/include/asm-generic/posix_types.h
@@ -10,8 +10,13 @@
  * architectures, so that you can override them.
  */
 
+#ifndef __kernel_long_t
+typedef long           __kernel_long_t;
+typedef unsigned long  __kernel_ulong_t;
+#endif
+
 #ifndef __kernel_ino_t
-typedef unsigned long  __kernel_ino_t;
+typedef __kernel_ulong_t __kernel_ino_t;
 #endif
 
 #ifndef __kernel_mode_t
@@ -19,7 +24,7 @@ typedef unsigned int  __kernel_mode_t;
 #endif
 
 #ifndef __kernel_nlink_t
-typedef unsigned long  __kernel_nlink_t;
+typedef __kernel_ulong_t __kernel_nlink_t;
 #endif
 
 #ifndef __kernel_pid_t
@@ -36,7 +41,7 @@ typedef unsigned int  __kernel_gid_t;
 #endif
 
 #ifndef __kernel_suseconds_t
-typedef long           __kernel_suseconds_t;
+typedef __kernel_long_t                __kernel_suseconds_t;
 #endif
 
 #ifndef __kernel_daddr_t
@@ -67,9 +72,9 @@ typedef unsigned int  __kernel_size_t;
 typedef int            __kernel_ssize_t;
 typedef int            __kernel_ptrdiff_t;
 #else
-typedef unsigned long  __kernel_size_t;
-typedef long           __kernel_ssize_t;
-typedef long           __kernel_ptrdiff_t;
+typedef __kernel_ulong_t __kernel_size_t;
+typedef __kernel_long_t        __kernel_ssize_t;
+typedef __kernel_long_t        __kernel_ptrdiff_t;
 #endif
 #endif
 
@@ -82,10 +87,10 @@ typedef struct {
 /*
  * anything below here should be completely generic
  */
-typedef long           __kernel_off_t;
+typedef __kernel_long_t        __kernel_off_t;
 typedef long long      __kernel_loff_t;
-typedef long           __kernel_time_t;
-typedef long           __kernel_clock_t;
+typedef __kernel_long_t        __kernel_time_t;
+typedef __kernel_long_t        __kernel_clock_t;
 typedef int            __kernel_timer_t;
 typedef int            __kernel_clockid_t;
 typedef char *         __kernel_caddr_t;