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From: Douglas Gilbert <dgilbert@interlog.com>
To: linux-scsi@vger.kernel.org
Cc: martin.petersen@oracle.com, jejb@linux.vnet.ibm.com, hare@suse.de
Subject: [PATCH v6 32/37] sg: add some __must_hold macros
Date: Mon, 13 Jan 2020 00:57:50 +0100	[thread overview]
Message-ID: <20200112235755.14197-33-dgilbert@interlog.com> (raw)
In-Reply-To: <20200112235755.14197-1-dgilbert@interlog.com>

In the case of sg_wait_open_event() which calls mutex_unlock on
sdp->open_rel_lock and later calls mutex_lock on the same
lock; this macro is needed to stop sparse complaining. In
other cases it is a reminder to the coder (a precondition).

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
---
 drivers/scsi/sg.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index adb4e2d3b1c6..4d3850a43304 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -377,6 +377,7 @@ sg_check_file_access(struct file *filp, const char *caller)
 
 static int
 sg_wait_open_event(struct sg_device *sdp, bool o_excl)
+		__must_hold(sdp->open_rel_lock)
 {
 	int res = 0;
 
@@ -1782,6 +1783,7 @@ sg_ctl_sg_io(struct file *filp, struct sg_device *sdp, struct sg_fd *sfp,
  */
 static int
 sg_set_reserved_sz(struct sg_fd *sfp, int want_rsv_sz)
+		__must_hold(sfp->f_mutex)
 {
 	bool use_new_srp = false;
 	int res = 0;
@@ -3746,12 +3748,12 @@ sg_remove_sfp(struct kref *kref)
 
 static int
 sg_idr_max_id(int id, void *p, void *data)
+		__must_hold(sg_index_lock)
 {
 	int *k = data;
 
 	if (*k < id)
 		*k = id;
-
 	return 0;
 }
 
@@ -4056,6 +4058,7 @@ sg_proc_seq_show_devstrs(struct seq_file *s, void *v)
 /* Writes debug info for one sg_request in obp buffer */
 static int
 sg_proc_debug_sreq(struct sg_request *srp, int to, char *obp, int len)
+		__must_hold(sfp->srp_arr.xa_lock)
 {
 	bool is_v3v4, v4, is_dur;
 	int n = 0;
@@ -4158,6 +4161,7 @@ sg_proc_debug_fd(struct sg_fd *fp, char *obp, int len, unsigned long idx)
 /* Writes debug info for one sg device (including its sg fds) in obp buffer */
 static int
 sg_proc_debug_sdev(struct sg_device *sdp, char *obp, int len, int *fd_counterp)
+		__must_hold(sg_index_lock)
 {
 	int n = 0;
 	int my_count = 0;
-- 
2.24.1


  parent reply	other threads:[~2020-01-12 23:58 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-12 23:57 [PATCH v6 00/37] sg: add v4 interface Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 01/37] sg: move functions around Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 02/37] sg: remove typedefs, type+formatting cleanup Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 03/37] sg: sg_log and is_enabled Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 04/37] sg: rework sg_poll(), minor changes Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 05/37] sg: bitops in sg_device Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 06/37] sg: make open count an atomic Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 07/37] sg: move header to uapi section Douglas Gilbert
2020-01-13  5:34   ` kbuild test robot
2020-01-14  9:16     ` Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 08/37] sg: speed sg_poll and sg_get_num_waiting Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 09/37] sg: sg_allow_if_err_recovery and renames Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 10/37] sg: improve naming Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 11/37] sg: change rwlock to spinlock Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 12/37] sg: ioctl handling Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 13/37] sg: split sg_read Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 14/37] sg: sg_common_write add structure for arguments Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 15/37] sg: rework sg_vma_fault Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 16/37] sg: rework sg_mmap Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 17/37] sg: replace sg_allow_access Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 18/37] sg: rework scatter gather handling Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 19/37] sg: introduce request state machine Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 20/37] sg: sg_find_srp_by_id Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 21/37] sg: sg_fill_request_element Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 22/37] sg: printk change %p to %pK Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 23/37] sg: xarray for fds in device Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 24/37] sg: xarray for reqs in fd Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 25/37] sg: replace rq array with lists Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 26/37] sg: sense buffer rework Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 27/37] sg: add sg v4 interface support Douglas Gilbert
2020-01-13  8:28   ` kbuild test robot
2020-01-14 10:21     ` Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 28/37] sg: rework debug info Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 29/37] sg: add 8 byte SCSI LUN to sg_scsi_id Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 30/37] sg: expand sg_comm_wr_t Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 31/37] sg: add sg_iosubmit_v3 and sg_ioreceive_v3 ioctls Douglas Gilbert
2020-01-13  0:50   ` Bart Van Assche
2020-01-13 10:39     ` Douglas Gilbert
2020-01-12 23:57 ` Douglas Gilbert [this message]
2020-01-12 23:57 ` [PATCH v6 33/37] sg: move procfs objects to avoid forward decls Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 34/37] sg: protect multiple receivers Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 35/37] sg: first debugfs support Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 36/37] sg: warn v3 write system call users Douglas Gilbert
2020-01-12 23:57 ` [PATCH v6 37/37] sg: bump version to 4.0.08 Douglas Gilbert

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