DEVEL15-linux-2623-support-20071004

FIXES 70773

update for support for 2.6.23


(cherry picked from commit 127cebfacdaf84292fc1ecfd64c0e8d259aba474)

acinclude.m4

@@ -597,6 +597,8 @@ case $AFS_SYSNAME in *_linux* | *_umlinux*)
 	         )
 
 		 LINUX_KERNEL_COMPILE_WORKS
+		 LINUX_HAVE_KMEM_CACHE_T
+		 LINUX_KMEM_CACHE_CREATE_TAKES_DTOR
 		 LINUX_CONFIG_H_EXISTS
 		 LINUX_COMPLETION_H_EXISTS
 		 LINUX_DEFINES_FOR_EACH_PROCESS
@@ -626,6 +628,7 @@ case $AFS_SYSNAME in *_linux* | *_umlinux*)
 	  	 LINUX_FOP_F_FLUSH_TAKES_FL_OWNER_T
 	  	 LINUX_AOP_WRITEBACK_CONTROL
 		 LINUX_FS_STRUCT_FOP_HAS_FLOCK
+		 LINUX_FS_STRUCT_FOP_HAS_SENDFILE
 		 LINUX_KERNEL_LINUX_SYSCALL_H
 		 LINUX_KERNEL_LINUX_SEQ_FILE_H
 		 LINUX_KERNEL_POSIX_LOCK_FILE_WAIT_ARG
@@ -870,12 +873,21 @@ case $AFS_SYSNAME in *_linux* | *_umlinux*)
 		 if test "x$ac_cv_linux_fs_struct_fop_has_flock" = "xyes" ; then
 		  AC_DEFINE(STRUCT_FILE_OPERATIONS_HAS_FLOCK, 1, [define if your struct file_operations has flock])
 		 fi
+		 if test "x$ac_cv_linux_fs_struct_fop_has_sendfile" = "xyes" ; then
+		  AC_DEFINE(STRUCT_FILE_OPERATIONS_HAS_SENDFILE, 1, [define if your struct file_operations has sendfile])
+		 fi
 		 if test "x$ac_cv_linux_register_sysctl_table_noflag" = "xyes" ; then
 		  AC_DEFINE(REGISTER_SYSCTL_TABLE_NOFLAG, 1, [define if register_sysctl_table has no insert_at head flag])
 		 fi
 		 if test "x$ac_cv_linux_exports_tasklist_lock" = "xyes" ; then
 		  AC_DEFINE(EXPORTED_TASKLIST_LOCK, 1, [define if tasklist_lock exported])
 		 fi
+		 if test "x$ac_cv_linux_have_kmem_cache_t" = "xyes" ; then
+		  AC_DEFINE(HAVE_KMEM_CACHE_T, 1, [define if kmem_cache_t exists])
+		 fi
+		 if test "x$ac_cv_linux_have_kmem_cache_t" = "xyes" ; then
+		  AC_DEFINE(KMEM_CACHE_TAKES_DTOR, 1, [define if kmem_cache_create takes a destructor argument])
+		 fi
 		 if test "x$ac_cv_linux_kernel_page_follow_link" = "xyes" -o "x$ac_cv_linux_func_i_put_link_takes_cookie" = "xyes"; then
 		  AC_DEFINE(USABLE_KERNEL_PAGE_SYMLINK_CACHE, 1, [define if your kernel has a usable symlink cache API])
 		 else

src/afs/LINUX/osi_vfsops.c

@@ -269,7 +269,11 @@ afs_notify_change(struct dentry *dp, struct iattr *iattrp)
 
 
 #if defined(STRUCT_SUPER_HAS_ALLOC_INODE)
+#if defined(HAVE_KMEM_CACHE_T)
 static kmem_cache_t *afs_inode_cachep;
+#else
+struct kmem_cache *afs_inode_cachep;
+#endif
 
 static struct inode *
 afs_alloc_inode(struct super_block *sb)
@@ -294,7 +298,11 @@ afs_destroy_inode(struct inode *inode)
 }
 
 static void
+#if defined(HAVE_KMEM_CACHE_T)
 init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+#else
+init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
+#endif
 {
     struct vcache *vcp = (struct vcache *) foo;
 
@@ -312,10 +320,17 @@ afs_init_inodecache(void)
 #define SLAB_RECLAIM_ACCOUNT 0
 #endif
 
+#if defined(KMEM_CACHE_TAKES_DTOR)
     afs_inode_cachep = kmem_cache_create("afs_inode_cache",
 					 sizeof(struct vcache),
 					 0, SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT,
 					 init_once, NULL);
+#else
+    afs_inode_cachep = kmem_cache_create("afs_inode_cache",
+					 sizeof(struct vcache),
+					 0, SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT,
+					 init_once);
+#endif
     if (afs_inode_cachep == NULL)
 	return -ENOMEM;
     return 0;

src/afs/LINUX/osi_vnodeops.c

@@ -658,7 +658,7 @@ struct file_operations afs_file_fops = {
   .mmap =	afs_linux_mmap,
   .open =	afs_linux_open,
   .flush =	afs_linux_flush,
-#ifdef AFS_LINUX26_ENV
+#if defined(AFS_LINUX26_ENV) && defined(STRUCT_FILE_OPERATIONS_HAS_SENDFILE)
   .sendfile =   generic_file_sendfile,
 #endif
   .release =	afs_linux_release,

src/cf/linux-test4.m4

@@ -871,3 +871,34 @@ fl_owner_t id;
       ac_cv_linux_func_f_flush_takes_fl_owner_t=no)])
   AC_MSG_RESULT($ac_cv_linux_func_f_flush_takes_fl_owner_t)])
 
+AC_DEFUN([LINUX_HAVE_KMEM_CACHE_T], [
+  AC_MSG_CHECKING([whether kmem_cache_t exists])
+  AC_CACHE_VAL([ac_cv_linux_have_kmem_cache_t], [
+    AC_TRY_KBUILD(
+[#include <linux/slab.h>],
+[kmem_cache_t *k;],
+      ac_cv_linux_have_kmem_cache_t=yes,
+      ac_cv_linux_have_kmem_cache_t=no)])
+  AC_MSG_RESULT($ac_cv_linux_have_kmem_cache_t)])
+
+AC_DEFUN([LINUX_KMEM_CACHE_CREATE_TAKES_DTOR], [
+  AC_MSG_CHECKING([whether kmem_cache_create takes a destructor argument])
+  AC_CACHE_VAL([ac_cv_linux_kmem_cache_create_takes_dtor], [
+    AC_TRY_KBUILD(
+[#include <linux/slab.h>],
+[kmem_cache_create(NULL, 0, 0, 0, NULL, NULL);],
+      ac_cv_linux_kmem_cache_create_takes_dtor=yes,
+      ac_cv_linux_kmem_cache_create_takes_dtor=no)])
+  AC_MSG_RESULT($ac_cv_linux_kmem_cache_create_takes_dtor)])
+
+AC_DEFUN([LINUX_FS_STRUCT_FOP_HAS_SENDFILE], [
+  AC_MSG_CHECKING([for sendfile in struct file_operations])
+  AC_CACHE_VAL([ac_cv_linux_fs_struct_fop_has_sendfile], [
+    AC_TRY_KBUILD(
+[#include <linux/fs.h>],
+[struct file_operations _fop;
+_fop.sendfile(NULL, NULL, 0, 0, NULL);],
+      ac_cv_linux_fs_struct_fop_has_sendfile=yes,
+      ac_cv_linux_fs_struct_fop_has_sendfile=no)])
+  AC_MSG_RESULT($ac_cv_linux_fs_struct_fop_has_sendfile)])
+