LU-12400 osd-ldiskfs: get rid of legacy 'get_ds()' function

get rid of legacy 'get_ds()' function

Every in-kernel use of this function defined it to KERNEL_DS
(either as an actual define, or as an inline function).

Linux-commit: 736706bee3298208343a76096370e4f6a5c55915

Test-Parameters: trivial
Signed-off-by: Shaun Tancheff <[email protected]>
Change-Id: I3aabe74802f1a953b140728f22c83125dae270c3
Reviewed-on: https://review.whamcloud.com/35238
Tested-by: jenkins <[email protected]>
Tested-by: Maloo <[email protected]>
Reviewed-by: Petros Koutoupis <[email protected]>
Reviewed-by: James Simmons <[email protected]>
Reviewed-by: Oleg Drokin <[email protected]>

Author: stancheff

libcfs/libcfs/linux/linux-prim.c

@@ -111,7 +111,7 @@ int cfs_kernel_write(struct file *filp, const void *buf, size_t count,
 	mm_segment_t __old_fs = get_fs();
 	int rc;
 
-	set_fs(get_ds());
+	set_fs(KERNEL_DS);
 	rc = vfs_write(filp, (__force const char __user *)buf, count, pos);
 	set_fs(__old_fs);
 

lustre/osd-ldiskfs/osd_compat.c

@@ -59,7 +59,7 @@ static void osd_push_ctxt(const struct osd_device *dev,
 	OBD_SET_CTXT_MAGIC(newctxt);
 	newctxt->pwdmnt = dev->od_mnt;
 	newctxt->pwd = dev->od_mnt->mnt_root;
-	newctxt->fs = get_ds();
+	newctxt->fs = KERNEL_DS;
 	newctxt->umask = current_umask();
 	newctxt->dt = NULL;
 

lustre/osd-ldiskfs/osd_io.c

@@ -1374,7 +1374,7 @@ static int osd_is_mapped(struct dt_object *dt, __u64 offset,
 	fei.fi_extents_start = &fe;
 
 	saved_fs = get_fs();
-	set_fs(get_ds());
+	set_fs(KERNEL_DS);
 	rc = inode->i_op->fiemap(inode, &fei, offset, FIEMAP_MAX_OFFSET-offset);
 	set_fs(saved_fs);
 	if (rc != 0)
@@ -2258,7 +2258,7 @@ static int osd_fiemap_get(const struct lu_env *env, struct dt_object *dt,
 	/* Save previous value address limit */
 	cur_fs = get_fs();
 	/* Set the address limit of the kernel */
-	set_fs(get_ds());
+	set_fs(KERNEL_DS);
 
 	rc = inode->i_op->fiemap(inode, &fieinfo, fm->fm_start, len);
 	fm->fm_flags = fieinfo.fi_flags;

lustre/osd-ldiskfs/osd_scrub.c

@@ -2594,7 +2594,7 @@ int osd_scrub_setup(const struct lu_env *env, struct osd_device *dev)
 	OBD_SET_CTXT_MAGIC(ctxt);
 	ctxt->pwdmnt = dev->od_mnt;
 	ctxt->pwd = dev->od_mnt->mnt_root;
-	ctxt->fs = get_ds();
+	ctxt->fs = KERNEL_DS;
 
 	init_waitqueue_head(&scrub->os_thread.t_ctl_waitq);
 	init_rwsem(&scrub->os_rwsem);

lustre/ptlrpc/sec_ctx.c

@@ -37,9 +37,9 @@
 /* Debugging check only needed during development */
 #ifdef OBD_CTXT_DEBUG
 # define ASSERT_CTXT_MAGIC(magic) LASSERT((magic) == OBD_RUN_CTXT_MAGIC)
-# define ASSERT_NOT_KERNEL_CTXT(msg) LASSERTF(!segment_eq(get_fs(), get_ds()),\
+# define ASSERT_NOT_KERNEL_CTXT(msg) LASSERTF(!segment_eq(get_fs(), KERNEL_DS),\
 					      msg)
-# define ASSERT_KERNEL_CTXT(msg) LASSERTF(segment_eq(get_fs(), get_ds()), msg)
+# define ASSERT_KERNEL_CTXT(msg) LASSERTF(segment_eq(get_fs(), KERNEL_DS), msg)
 #else
 # define ASSERT_CTXT_MAGIC(magic) do {} while(0)
 # define ASSERT_NOT_KERNEL_CTXT(msg) do {} while(0)