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Pull in timespec, list, and type compat changes to support

Browse Source 
building against a wider range of kernels.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@152 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo 2008-08-11 17:20:11 +00:00
parent 86149aa255
commit 6a6cafbe8d
6 changed files with 145 additions and 15 deletions
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92
autoconf/spl-build.m4
View File

@ -289,6 +289,8 @@ AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
fi
])
dnl #
dnl # 2.6.x API change
dnl # check if uintptr_t typedef is defined
@ -445,17 +447,17 @@ dnl # 2.6.16 API change.
dnl # Check if 'fls64()' is available
dnl #
AC_DEFUN([SPL_AC_FLS64],
[AC_MSG_CHECKING([whether fls64() is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/bitops.h>
],[
return fls64(0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
],[
AC_MSG_RESULT(no)
])
[AC_MSG_CHECKING([whether fls64() is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/bitops.h>
],[
return fls64(0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
],[
AC_MSG_RESULT(no)
])
])
dnl #
@ -469,7 +471,7 @@ AC_DEFUN([SPL_AC_DEVICE_CREATE], [
[drivers/base/core.c],
[AC_DEFINE(HAVE_DEVICE_CREATE, 1,
[device_create() is available])],
[])
[])
])
dnl #
@ -483,5 +485,69 @@ AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
[drivers/base/class.c],
[AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
[class_device_create() is available])],
[])
[])
])
dnl #
dnl # 2.6.26 API change, set_normalized_timespec() is exported.
dnl #
AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
SPL_CHECK_SYMBOL_EXPORT(
[class_device_create],
[drivers/base/class.c],
[AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
[class_device_create() is available])],
[])
])
dnl #
dnl # 2.6.26 API change, set_normalized_timespec() is exported.
dnl #
AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT], [
SPL_CHECK_SYMBOL_EXPORT(
[set_normalized_timespec],
[kernel/time.c],
[AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
[set_normalized_timespec() is available as export])],
[])
])
dnl #
dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
dnl # previously it was available in time.h as an inline.
dnl #
AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE],
[AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
SPL_LINUX_TRY_COMPILE([
#include <linux/time.h>
],[
void set_normalized_timespec(struct timespec *ts,
time_t sec, long nsec) { }
],[
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
[set_normalized_timespec() is available as inline])
])
])
dnl #
dnl # 2.6.18 API change,
dnl # timespec_sub() inline function available in linux/time.h
dnl #
AC_DEFUN([SPL_AC_TIMESPEC_SUB],
[AC_MSG_CHECKING([whether timespec_sub() is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/time.h>
],[
struct timespec a, b, c = { 0 };
c = timespec_sub(a, b);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
],[
AC_MSG_RESULT(no)
])
])

3
configure.ac
View File

@ -54,6 +54,9 @@ SPL_AC_CTL_UNNUMBERED
SPL_AC_FLS64
SPL_AC_DEVICE_CREATE
SPL_AC_CLASS_DEVICE_CREATE
SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT
SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE
SPL_AC_TIMESPEC_SUB
TOPDIR=`/bin/pwd`

27
include/linux/list_compat.h Normal file
View File

@ -0,0 +1,27 @@
#ifndef _SPL_LIST_COMPAT_H
#define _SPL_LIST_COMPAT_H
#include <linux/list.h>
#ifndef list_for_each_entry_safe_reverse
/**
* list_for_each_entry_safe_reverse
* @pos: the type * to use as a loop cursor.
* @n: another type * to use as temporary storage
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*
* Iterate backwards over list of given type, safe against removal
* of list entry.
*/
#define list_for_each_entry_safe_reverse(pos, n, head, member) \
for (pos = list_entry((head)->prev, typeof(*pos), member), \
n = list_entry(pos->member.prev, typeof(*pos), member); \
&pos->member != (head); \
pos = n, n = list_entry(n->member.prev, typeof(*n), member))
#endif /* list_for_each_entry_safe_reverse */
#endif /* SPL_LIST_COMPAT_H */

21
include/linux/time_compat.h Normal file
View File

@ -0,0 +1,21 @@
#ifndef _SPL_TIME_COMPAT_H
#define _SPL_TIME_COMPAT_H
#include <linux/time.h>
/* timespec_sub() API changes
* 2.6.18 - 2.6.x: Inline function provided by linux/time.h
*/
#ifndef HAVE_TIMESPEC_SUB
static inline struct timespec
timespec_sub(struct timespec lhs, struct timespec rhs)
{
struct timespec ts_delta;
set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec,
lhs.tv_nsec - rhs.tv_nsec);
return ts_delta;
}
#endif /* HAVE_TIMESPEC_SUB */
#endif /* _SPL_TIME_COMPAT_H */

8
include/sys/types.h
View File

@ -13,6 +13,14 @@ extern "C" {
typedef unsigned long uintptr_t;
#endif
#ifndef ULLONG_MAX
#define ULLONG_MAX (~0ULL)
#endif
#ifndef LLONG_MAX
#define LLONG_MAX ((long long)(~0ULL>>1))
#endif
typedef enum { B_FALSE=0, B_TRUE=1 } boolean_t;
typedef unsigned long intptr_t;
typedef unsigned long ulong_t;

9
modules/spl/spl-time.c
View File

@ -67,9 +67,13 @@ __gethrtime(void) {
}
EXPORT_SYMBOL(__gethrtime);
/* Not exported from the kernel, but we need it for timespec_sub. Be very
* careful here we are using the kernel prototype, so that must not change.
/* set_normalized_timespec() API changes
* 2.6.0 - 2.6.15: Inline function provided by linux/time.h
* 2.6.16 - 2.6.25: Function prototypedefined but not exported
* 2.6.26 - 2.6.x: Function defined and exported
*/
#if !defined(HAVE_SET_NORMALIZED_TIMESPEC_INLINE) && \
!defined(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT)
void
set_normalized_timespec(struct timespec *ts, time_t sec, long nsec)
{
@ -85,3 +89,4 @@ set_normalized_timespec(struct timespec *ts, time_t sec, long nsec)
ts->tv_nsec = nsec;
}
EXPORT_SYMBOL(set_normalized_timespec);
#endif