__kernel_uapi_size_t is a pure UAPI type, in defined(__KERNEL__) code
it's always the same as __kernel_size_t.
It's also the same as __kernel_size_t on all architectures except x32
where sizeof(size_t) < sizeof(__kernel_size_t).
__kernel_uapi_size_t can be used as a size_t replacement in UAPI
headers, e.g. in cases when size_t might differ from __kernel_size_t.
Signed-off-by: Dmitry V. Levin <ldv@xxxxxxxxxxxx>
---
include/uapi/asm-generic/posix_types.h | 10 ++++++++++
arch/x86/include/uapi/asm/posix_types_x32.h | 3 +++
2 files changed, 13 insertions(+)
diff --git a/include/uapi/asm-generic/posix_types.h b/include/uapi/asm-generic/posix_types.h
index fe74fcc..e93c324 100644
--- a/include/uapi/asm-generic/posix_types.h
+++ b/include/uapi/asm-generic/posix_types.h
@@ -74,6 +74,16 @@ typedef __kernel_long_t __kernel_ptrdiff_t;
#endif
#endif
+/*
+ * __kernel_uapi_size_t is a pure UAPI type, in defined(__KERNEL__) code
+ * it's always the same as __kernel_size_t.
+ * __kernel_uapi_size_t can be used as a size_t replacement in UAPI headers,
+ * e.g. in cases when size_t might differ from __kernel_size_t.
+ */
+#ifndef __kernel_uapi_size_t
+typedef __kernel_size_t __kernel_uapi_size_t;
+#endif
+
#ifndef __kernel_fsid_t
typedef struct {
int val[2];
diff --git a/arch/x86/include/uapi/asm/posix_types_x32.h b/arch/x86/include/uapi/asm/posix_types_x32.h
index 85f9bda..0e36e67 100644
--- a/arch/x86/include/uapi/asm/posix_types_x32.h
+++ b/arch/x86/include/uapi/asm/posix_types_x32.h
@@ -14,6 +14,9 @@ typedef long long __kernel_long_t;
typedef unsigned long long __kernel_ulong_t;
#define __kernel_long_t __kernel_long_t
+typedef unsigned int __kernel_uapi_size_t;
+#define __kernel_uapi_size_t __kernel_uapi_size_t
+
#include <asm/posix_types_64.h>
#endif /* _ASM_X86_POSIX_TYPES_X32_H */
--
ldv
