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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 00:11:03 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 00:11:03 +0300
commitec3604c7a5aae8953545b0d05495357009a960e5 (patch)
treedd3927047b90048231d924fc151a9d1881f7b8cd /lib
parent066dea8c30ae7d8e061145bcf5422ce0773582eb (diff)
parent6d4b51241394664fffbf68ea86c96d2699344583 (diff)
downloadlinux-ec3604c7a5aae8953545b0d05495357009a960e5.tar.xz
Merge tag 'wberr-v4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux
Pull writeback error handling updates from Jeff Layton: "This pile continues the work from last cycle on better tracking writeback errors. In v4.13 we added some basic errseq_t infrastructure and converted a few filesystems to use it. This set continues refining that infrastructure, adds documentation, and converts most of the other filesystems to use it. The main exception at this point is the NFS client" * tag 'wberr-v4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux: ecryptfs: convert to file_write_and_wait in ->fsync mm: remove optimizations based on i_size in mapping writeback waits fs: convert a pile of fsync routines to errseq_t based reporting gfs2: convert to errseq_t based writeback error reporting for fsync fs: convert sync_file_range to use errseq_t based error-tracking mm: add file_fdatawait_range and file_write_and_wait fuse: convert to errseq_t based error tracking for fsync mm: consolidate dax / non-dax checks for writeback Documentation: add some docs for errseq_t errseq: rename __errseq_set to errseq_set
Diffstat (limited to 'lib')
-rw-r--r--lib/errseq.c17
1 files changed, 7 insertions, 10 deletions
diff --git a/lib/errseq.c b/lib/errseq.c
index 841fa24e6e00..7b900c2a277a 100644
--- a/lib/errseq.c
+++ b/lib/errseq.c
@@ -41,23 +41,20 @@
#define ERRSEQ_CTR_INC (1 << (ERRSEQ_SHIFT + 1))
/**
- * __errseq_set - set a errseq_t for later reporting
+ * errseq_set - set a errseq_t for later reporting
* @eseq: errseq_t field that should be set
- * @err: error to set
+ * @err: error to set (must be between -1 and -MAX_ERRNO)
*
* This function sets the error in *eseq, and increments the sequence counter
* if the last sequence was sampled at some point in the past.
*
* Any error set will always overwrite an existing error.
*
- * Most callers will want to use the errseq_set inline wrapper to efficiently
- * handle the common case where err is 0.
- *
- * We do return an errseq_t here, primarily for debugging purposes. The return
- * value should not be used as a previously sampled value in later calls as it
- * will not have the SEEN flag set.
+ * We do return the latest value here, primarily for debugging purposes. The
+ * return value should not be used as a previously sampled value in later calls
+ * as it will not have the SEEN flag set.
*/
-errseq_t __errseq_set(errseq_t *eseq, int err)
+errseq_t errseq_set(errseq_t *eseq, int err)
{
errseq_t cur, old;
@@ -107,7 +104,7 @@ errseq_t __errseq_set(errseq_t *eseq, int err)
}
return cur;
}
-EXPORT_SYMBOL(__errseq_set);
+EXPORT_SYMBOL(errseq_set);
/**
* errseq_sample - grab current errseq_t value