[020/622] lnet: libcfs: remove unnecessary set_fs(KERNEL_DS)

Commit Message

James Simmons Feb. 27, 2020, 9:08 p.m. UTC

From: Mike Marciniszyn <[e-mail]>

When we converted to using kernel_write(), we left some
set_fs() calls that are not unnecessary.
Remove them.

Original OpenSFS version of this patch, as mentioned below,
did the full conversion to kernel_write.

WC-bug-id: https://jira.whamcloud.com/browse/LU-10560
lustre-commit: b9a32054600a ("LU-10560 libcfs: Use kernel_write when appropriate")
Signed-off-by: Mike Marciniszyn <[e-mail]>
Reviewed-on: https://review.whamcloud.com/31154
Reviewed-by: James Simmons <[e-mail]>
Reviewed-by: Dmitry Eremin <[e-mail]>
Reviewed-by: John L. Hammond <[e-mail]>
Reviewed-by: Oleg Drokin <[e-mail]>
igned-off-by: James Simmons <[e-mail]>
---
 net/lnet/libcfs/tracefile.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

Patch

diff --git a/net/lnet/libcfs/tracefile.c b/net/lnet/libcfs/tracefile.c
index 3b29116..6e4cc31 100644
--- a/net/lnet/libcfs/tracefile.c
+++ b/net/lnet/libcfs/tracefile.c
@@ -807,7 +807,6 @@  int cfs_tracefile_dump_all_pages(char *filename)
 	struct cfs_trace_page *tage;
 	struct cfs_trace_page *tmp;
 	char *buf;
-	mm_segment_t __oldfs;
 	int rc;
 
 	down_write(&cfs_tracefile_sem);
@@ -828,8 +827,6 @@  int cfs_tracefile_dump_all_pages(char *filename)
 		rc = 0;
 		goto close;
 	}
-	__oldfs = get_fs();
-	set_fs(KERNEL_DS);
 
 	/* ok, for now, just write the pages.  in the future we'll be building
 	 * iobufs with the pages and calling generic_direct_IO
@@ -851,7 +848,7 @@  int cfs_tracefile_dump_all_pages(char *filename)
 		list_del(&tage->linkage);
 		cfs_tage_free(tage);
 	}
-	set_fs(__oldfs);
+
 	rc = vfs_fsync(filp, 1);
 	if (rc)
 		pr_err("sync returns %d\n", rc);