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Subject[tip: timers/core] linux/limits.h: Extract common header for vDSO
The following commit has been merged into the timers/core branch of tip:

Commit-ID: 3e0e9f8c6e3ca92154a74edc23a8872da921d2b6
Gitweb: https://git.kernel.org/tip/3e0e9f8c6e3ca92154a74edc23a8872da921d2b6
Author: Vincenzo Frascino <vincenzo.frascino@arm.com>
AuthorDate: Fri, 20 Mar 2020 14:53:28
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Sat, 21 Mar 2020 15:23:54 +01:00

linux/limits.h: Extract common header for vDSO

The vDSO library should only include the necessary headers required for
a userspace library (UAPI and a minimal set of kernel headers). To make
this possible it is necessary to isolate from the kernel headers the
common parts that are strictly necessary to build the library.

Split limits.h into linux and common headers to make the latter suitable
for inclusion in the vDSO library.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200320145351.32292-4-vincenzo.frascino@arm.com

---
include/linux/limits.h | 13 +------------
include/vdso/limits.h | 19 +++++++++++++++++++
2 files changed, 20 insertions(+), 12 deletions(-)
create mode 100644 include/vdso/limits.h

diff --git a/include/linux/limits.h b/include/linux/limits.h
index 76afcd2..7fc497e 100644
--- a/include/linux/limits.h
+++ b/include/linux/limits.h
@@ -4,19 +4,8 @@

#include <uapi/linux/limits.h>
#include <linux/types.h>
+#include <vdso/limits.h>

-#define USHRT_MAX ((unsigned short)~0U)
-#define SHRT_MAX ((short)(USHRT_MAX >> 1))
-#define SHRT_MIN ((short)(-SHRT_MAX - 1))
-#define INT_MAX ((int)(~0U >> 1))
-#define INT_MIN (-INT_MAX - 1)
-#define UINT_MAX (~0U)
-#define LONG_MAX ((long)(~0UL >> 1))
-#define LONG_MIN (-LONG_MAX - 1)
-#define ULONG_MAX (~0UL)
-#define LLONG_MAX ((long long)(~0ULL >> 1))
-#define LLONG_MIN (-LLONG_MAX - 1)
-#define ULLONG_MAX (~0ULL)
#define SIZE_MAX (~(size_t)0)
#define PHYS_ADDR_MAX (~(phys_addr_t)0)

diff --git a/include/vdso/limits.h b/include/vdso/limits.h
new file mode 100644
index 0000000..0197888
--- /dev/null
+++ b/include/vdso/limits.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __VDSO_LIMITS_H
+#define __VDSO_LIMITS_H
+
+#define USHRT_MAX ((unsigned short)~0U)
+#define SHRT_MAX ((short)(USHRT_MAX >> 1))
+#define SHRT_MIN ((short)(-SHRT_MAX - 1))
+#define INT_MAX ((int)(~0U >> 1))
+#define INT_MIN (-INT_MAX - 1)
+#define UINT_MAX (~0U)
+#define LONG_MAX ((long)(~0UL >> 1))
+#define LONG_MIN (-LONG_MAX - 1)
+#define ULONG_MAX (~0UL)
+#define LLONG_MAX ((long long)(~0ULL >> 1))
+#define LLONG_MIN (-LLONG_MAX - 1)
+#define ULLONG_MAX (~0ULL)
+#define UINTPTR_MAX ULONG_MAX
+
+#endif /* __VDSO_LIMITS_H */
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