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UPSTREAM: linux/limits.h: Extract common header for vDSO

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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
(cherry picked from commit 3e0e9f8c6e3ca92154a74edc23a8872da921d2b6)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 154668398
Change-Id: I44a17919f0155af9efcb514041c01350bb80c16f
This commit is contained in:
Vincenzo Frascino 2020-03-20 14:53:28 +00:00 committed by Alistair Delva
parent 5934d33fbe
commit cef03febb2
2 changed files with 20 additions and 12 deletions
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13
include/linux/limits.h
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@ -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)

19
include/vdso/limits.h Normal file
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@ -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 */