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Subject[PATCH 04/30] posix_types: Introduce __kernel_[u]long_t
From: "H. Peter Anvin" <>

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 <>
include/asm-generic/posix_types.h | 23 ++++++++++++++---------
1 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/include/asm-generic/posix_types.h b/include/asm-generic/posix_types.h
index e294fe6..91d44bd 100644
--- 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;
#ifndef __kernel_ino_t
-typedef unsigned long __kernel_ino_t;
+typedef __kernel_ulong_t __kernel_ino_t;

#ifndef __kernel_mode_t
@@ -19,7 +24,7 @@ typedef unsigned int __kernel_mode_t;

#ifndef __kernel_nlink_t
-typedef unsigned long __kernel_nlink_t;
+typedef __kernel_ulong_t __kernel_nlink_t;

#ifndef __kernel_pid_t
@@ -36,7 +41,7 @@ typedef unsigned int __kernel_gid_t;

#ifndef __kernel_suseconds_t
-typedef long __kernel_suseconds_t;
+typedef __kernel_long_t __kernel_suseconds_t;

#ifndef __kernel_daddr_t
@@ -67,9 +72,9 @@ typedef unsigned int __kernel_size_t;
typedef int __kernel_ssize_t;
typedef int __kernel_ptrdiff_t;
-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;

@@ -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;

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