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Start bringing in Ricardo's spl-00-rhel4-compat.patch, a few chunks

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at a time as I audit it.  This chunk finishes moving the SPL entirely
off the linux slab on to the SPL implementation.  It differs slightly
from the proposed version in that the spl continues to export to
all the Solaris types and functions.  These do conflict with the
Linux slab so a module usings these interfaces must not include the
SPL slab if they also intend to use the linux slab.  Or they must
explcitly #undef the macros which remap the functioin to their
spl_* equivilants.

A nice side of effect of dropping the entire linux slab is we
don't need to autoconf checks anymore.  They kept messing with
the slab API endlessly!



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@148 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo
2008-08-05 04:16:09 +00:00
parent 73035a29eb
commit 7afde631f6
5 changed files with 3 additions and 121 deletions
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autoconf/spl-build.m4
-109
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@@ -308,44 +308,6 @@ AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
])
])
dnl #
dnl # 2.6.x API change
dnl # check if kmem_cache_t typedef is defined
dnl #
AC_DEFUN([SPL_AC_TYPE_KMEM_CACHE_T],
[AC_MSG_CHECKING([whether kernel defines kmem_cache_t])
SPL_LINUX_TRY_COMPILE([
#include <linux/slab.h>
],[
kmem_cache_t *cache;
],[
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_KMEM_CACHE_T, 1,
[kernel defines kmem_cache_t])
],[
AC_MSG_RESULT([no])
])
])
dnl #
dnl # 2.6.19 API change
dnl # kmem_cache_destroy() return void instead of int
dnl #
AC_DEFUN([SPL_AC_KMEM_CACHE_DESTROY_INT],
[AC_MSG_CHECKING([whether kmem_cache_destroy() returns int])
SPL_LINUX_TRY_COMPILE([
#include <linux/slab.h>
],[
int i = kmem_cache_destroy(NULL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMEM_CACHE_DESTROY_INT, 1,
[kmem_cache_destroy() returns int])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.19 API change
dnl # panic_notifier_list use atomic_notifier operations
@@ -407,77 +369,6 @@ AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
])
])
dnl #
dnl # 2.6.21 API change
dnl # Use struct kmem_cache for missing kmem_cache_t
dnl #
AC_DEFUN([SPL_AC_KMEM_CACHE_T], [
AC_MSG_CHECKING([whether kernel has kmem_cache_t])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/slab.h>
],[
kmem_cache_t *cachep = NULL;
kmem_cache_free(cachep, NULL);
],[
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_KMEM_CACHE_T, 1,
[kernel has struct kmem_cache_t])
],[
AC_MSG_RESULT([no])
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 2.6.23 API change
dnl # Slab no longer accepts a dtor argument
dnl #
AC_DEFUN([SPL_AC_KMEM_CACHE_CREATE_DTOR],
[AC_MSG_CHECKING([whether kmem_cache_create() has dtor arg])
SPL_LINUX_TRY_COMPILE([
#include <linux/slab.h>
],[
kmem_cache_create(NULL, 0, 0, 0, NULL, NULL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMEM_CACHE_CREATE_DTOR, 1,
[kmem_cache_create() has dtor arg])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.x API change
dnl # Slab ctor no longer takes 3 args
dnl #
AC_DEFUN([SPL_AC_3ARG_KMEM_CACHE_CREATE_CTOR],
[AC_MSG_CHECKING([whether slab ctor wants 3 args])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/slab.h>
],[
void (*ctor)(void *,struct kmem_cache *,unsigned long) = NULL;
#ifdef HAVE_KMEM_CACHE_CREATE_DTOR
kmem_cache_create(NULL, 0, 0, 0, ctor, NULL);
#else
kmem_cache_create(NULL, 0, 0, 0, ctor);
#endif
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_3ARG_KMEM_CACHE_CREATE_CTOR, 1,
[slab ctor wants 3 args])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 2.6.x API change
dnl # Old set_shrinker API replaced with register_shrinker