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Message-Id: <20200224212352.8640-5-w@1wt.eu>
Date: Mon, 24 Feb 2020 22:23:46 +0100
From: Willy Tarreau <w@....eu>
To: Denis Efremov <efremov@...ux.com>
Cc: Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
linux-block@...r.kernel.org,
Linus Torvalds <torvalds@...ux-foundation.org>,
Willy Tarreau <w@....eu>
Subject: [PATCH 04/10] floppy: cleanup: expand macro UDRS
This macro doesn't bring much value and only slightly obfuscates the
code by silently using local variable "drive", let's expand it.
Signed-off-by: Willy Tarreau <w@....eu>
---
drivers/block/floppy.c | 162 +++++++++++++++++++++++++------------------------
1 file changed, 83 insertions(+), 79 deletions(-)
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 8fcedb2..522fbcc 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -310,7 +310,6 @@ static bool initialized;
#define DRS (&drive_state[current_drive])
#define DRWE (&write_errors[current_drive])
-#define UDRS (&drive_state[drive])
#define UDRWE (&write_errors[drive])
#define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
@@ -603,7 +602,7 @@ static unsigned char in_sector_offset; /* offset within physical sector,
static inline bool drive_no_geom(int drive)
{
- return !current_type[drive] && !ITYPE(UDRS->fd_device);
+ return !current_type[drive] && !ITYPE(drive_state[drive].fd_device);
}
#ifndef fd_eject
@@ -737,7 +736,7 @@ static int disk_change(int drive)
{
int fdc = FDC(drive);
- if (time_before(jiffies, UDRS->select_date + drive_params[drive].select_delay))
+ if (time_before(jiffies, drive_state[drive].select_date + drive_params[drive].select_delay))
DPRINT("WARNING disk change called early\n");
if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive))) ||
(fdc_state[fdc].dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
@@ -751,19 +750,22 @@ static int disk_change(int drive)
debug_dcl(drive_params[drive].flags, "jiffies=%lu\n", jiffies);
debug_dcl(drive_params[drive].flags, "disk change line=%x\n",
fd_inb(FD_DIR) & 0x80);
- debug_dcl(drive_params[drive].flags, "flags=%lx\n", UDRS->flags);
+ debug_dcl(drive_params[drive].flags, "flags=%lx\n",
+ drive_state[drive].flags);
if (drive_params[drive].flags & FD_BROKEN_DCL)
- return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+ return test_bit(FD_DISK_CHANGED_BIT,
+ &drive_state[drive].flags);
if ((fd_inb(FD_DIR) ^ drive_params[drive].flags) & 0x80) {
- set_bit(FD_VERIFY_BIT, &UDRS->flags);
+ set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
/* verify write protection */
- if (UDRS->maxblock) /* mark it changed */
- set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+ if (drive_state[drive].maxblock) /* mark it changed */
+ set_bit(FD_DISK_CHANGED_BIT,
+ &drive_state[drive].flags);
/* invalidate its geometry */
- if (UDRS->keep_data >= 0) {
+ if (drive_state[drive].keep_data >= 0) {
if ((drive_params[drive].flags & FTD_MSG) &&
current_type[drive] != NULL)
DPRINT("Disk type is undefined after disk change\n");
@@ -773,8 +775,8 @@ static int disk_change(int drive)
return 1;
} else {
- UDRS->last_checked = jiffies;
- clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
+ drive_state[drive].last_checked = jiffies;
+ clear_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags);
}
return 0;
}
@@ -816,7 +818,7 @@ static int set_dor(int fdc, char mask, char data)
unit = newdor & 0x3;
if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
drive = REVDRIVE(fdc, unit);
- UDRS->select_date = jiffies;
+ drive_state[drive].select_date = jiffies;
}
}
return olddor;
@@ -844,8 +846,8 @@ static void reset_fdc_info(int mode)
fdc_state[fdc].perp_mode = 1;
fdc_state[fdc].rawcmd = 0;
for (drive = 0; drive < N_DRIVE; drive++)
- if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
- UDRS->track = NEED_2_RECAL;
+ if (FDC(drive) == fdc && (mode || drive_state[drive].track != NEED_1_RECAL))
+ drive_state[drive].track = NEED_2_RECAL;
}
/* selects the fdc and drive, and enables the fdc's input/dma. */
@@ -930,7 +932,7 @@ static void floppy_off(unsigned int drive)
/* make spindle stop in a position which minimizes spinup time
* next time */
if (drive_params[drive].rps) {
- delta = jiffies - UDRS->first_read_date + HZ -
+ delta = jiffies - drive_state[drive].first_read_date + HZ -
drive_params[drive].spindown_offset;
delta = ((delta * drive_params[drive].rps) % HZ) / drive_params[drive].rps;
motor_off_timer[drive].expires =
@@ -956,7 +958,7 @@ static void scandrives(void)
saved_drive = current_drive;
for (i = 0; i < N_DRIVE; i++) {
drive = (saved_drive + i + 1) % N_DRIVE;
- if (UDRS->fd_ref == 0 || drive_params[drive].select_delay != 0)
+ if (drive_state[drive].fd_ref == 0 || drive_params[drive].select_delay != 0)
continue; /* skip closed drives */
set_fdc(drive);
if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
@@ -2065,7 +2067,7 @@ static void bad_flp_intr(void)
static void set_floppy(int drive)
{
- int type = ITYPE(UDRS->fd_device);
+ int type = ITYPE(drive_state[drive].fd_device);
if (type)
_floppy = floppy_type + type;
@@ -3183,11 +3185,11 @@ static int raw_cmd_ioctl(int cmd, void __user *param)
if (FDC(drive) != fdc)
continue;
if (drive == current_drive) {
- if (UDRS->fd_ref > 1) {
+ if (drive_state[drive].fd_ref > 1) {
fdc_state[fdc].rawcmd = 2;
break;
}
- } else if (UDRS->fd_ref) {
+ } else if (drive_state[drive].fd_ref) {
fdc_state[fdc].rawcmd = 2;
break;
}
@@ -3405,7 +3407,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
unsigned long param)
{
int drive = (long)bdev->bd_disk->private_data;
- int type = ITYPE(UDRS->fd_device);
+ int type = ITYPE(drive_state[drive].fd_device);
int i;
int ret;
int size;
@@ -3453,7 +3455,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
switch (cmd) {
case FDEJECT:
- if (UDRS->fd_ref != 1)
+ if (drive_state[drive].fd_ref != 1)
/* somebody else has this drive open */
return -EBUSY;
if (lock_fdc(drive))
@@ -3463,8 +3465,8 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
* non-Sparc architectures */
ret = fd_eject(UNIT(drive));
- set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
- set_bit(FD_VERIFY_BIT, &UDRS->flags);
+ set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
+ set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
process_fd_request();
return ret;
case FDCLRPRM:
@@ -3472,7 +3474,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
return -EINTR;
current_type[drive] = NULL;
floppy_sizes[drive] = MAX_DISK_SIZE << 1;
- UDRS->keep_data = 0;
+ drive_state[drive].keep_data = 0;
return invalidate_drive(bdev);
case FDSETPRM:
case FDDEFPRM:
@@ -3497,7 +3499,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
return -EINTR;
if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
return -EINTR;
- ret = UDRS->flags;
+ ret = drive_state[drive].flags;
process_fd_request();
if (ret & FD_VERIFY)
return -ENODEV;
@@ -3505,7 +3507,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
return -EROFS;
return 0;
case FDFMTTRK:
- if (UDRS->fd_ref != 1)
+ if (drive_state[drive].fd_ref != 1)
return -EBUSY;
return do_format(drive, &inparam.f);
case FDFMTEND:
@@ -3543,7 +3545,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
process_fd_request();
/* fall through */
case FDGETDRVSTAT:
- outparam = UDRS;
+ outparam = &drive_state[drive];
break;
case FDRESET:
return user_reset_fdc(drive, (int)param, true);
@@ -3690,7 +3692,7 @@ static int compat_set_geometry(struct block_device *bdev, fmode_t mode, unsigned
mutex_lock(&floppy_mutex);
drive = (long)bdev->bd_disk->private_data;
- type = ITYPE(UDRS->fd_device);
+ type = ITYPE(drive_state[drive].fd_device);
err = set_geometry(cmd == FDSETPRM32 ? FDSETPRM : FDDEFPRM,
&v, drive, type, bdev);
mutex_unlock(&floppy_mutex);
@@ -3706,7 +3708,8 @@ static int compat_get_prm(int drive,
memset(&v, 0, sizeof(v));
mutex_lock(&floppy_mutex);
- err = get_floppy_geometry(drive, ITYPE(UDRS->fd_device), &p);
+ err = get_floppy_geometry(drive, ITYPE(drive_state[drive].fd_device),
+ &p);
if (err) {
mutex_unlock(&floppy_mutex);
return err;
@@ -3803,20 +3806,20 @@ static int compat_getdrvstat(int drive, bool poll,
goto Eintr;
process_fd_request();
}
- v.spinup_date = UDRS->spinup_date;
- v.select_date = UDRS->select_date;
- v.first_read_date = UDRS->first_read_date;
- v.probed_format = UDRS->probed_format;
- v.track = UDRS->track;
- v.maxblock = UDRS->maxblock;
- v.maxtrack = UDRS->maxtrack;
- v.generation = UDRS->generation;
- v.keep_data = UDRS->keep_data;
- v.fd_ref = UDRS->fd_ref;
- v.fd_device = UDRS->fd_device;
- v.last_checked = UDRS->last_checked;
- v.dmabuf = (uintptr_t)UDRS->dmabuf;
- v.bufblocks = UDRS->bufblocks;
+ v.spinup_date = drive_state[drive].spinup_date;
+ v.select_date = drive_state[drive].select_date;
+ v.first_read_date = drive_state[drive].first_read_date;
+ v.probed_format = drive_state[drive].probed_format;
+ v.track = drive_state[drive].track;
+ v.maxblock = drive_state[drive].maxblock;
+ v.maxtrack = drive_state[drive].maxtrack;
+ v.generation = drive_state[drive].generation;
+ v.keep_data = drive_state[drive].keep_data;
+ v.fd_ref = drive_state[drive].fd_ref;
+ v.fd_device = drive_state[drive].fd_device;
+ v.last_checked = drive_state[drive].last_checked;
+ v.dmabuf = (uintptr_t) drive_state[drive].dmabuf;
+ v.bufblocks = drive_state[drive].bufblocks;
mutex_unlock(&floppy_mutex);
if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_struct)))
@@ -3985,11 +3988,11 @@ static void floppy_release(struct gendisk *disk, fmode_t mode)
mutex_lock(&floppy_mutex);
mutex_lock(&open_lock);
- if (!UDRS->fd_ref--) {
+ if (!drive_state[drive].fd_ref--) {
DPRINT("floppy_release with fd_ref == 0");
- UDRS->fd_ref = 0;
+ drive_state[drive].fd_ref = 0;
}
- if (!UDRS->fd_ref)
+ if (!drive_state[drive].fd_ref)
opened_bdev[drive] = NULL;
mutex_unlock(&open_lock);
mutex_unlock(&floppy_mutex);
@@ -4010,16 +4013,16 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
mutex_lock(&floppy_mutex);
mutex_lock(&open_lock);
- old_dev = UDRS->fd_device;
+ old_dev = drive_state[drive].fd_device;
if (opened_bdev[drive] && opened_bdev[drive] != bdev)
goto out2;
- if (!UDRS->fd_ref && (drive_params[drive].flags & FD_BROKEN_DCL)) {
- set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
- set_bit(FD_VERIFY_BIT, &UDRS->flags);
+ if (!drive_state[drive].fd_ref && (drive_params[drive].flags & FD_BROKEN_DCL)) {
+ set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
+ set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
}
- UDRS->fd_ref++;
+ drive_state[drive].fd_ref++;
opened_bdev[drive] = bdev;
@@ -4056,7 +4059,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
}
new_dev = MINOR(bdev->bd_dev);
- UDRS->fd_device = new_dev;
+ drive_state[drive].fd_device = new_dev;
set_capacity(disks[drive], floppy_sizes[new_dev]);
if (old_dev != -1 && old_dev != new_dev) {
if (buffer_drive == drive)
@@ -4068,26 +4071,27 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
if (!(mode & FMODE_NDELAY)) {
if (mode & (FMODE_READ|FMODE_WRITE)) {
- UDRS->last_checked = 0;
- clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
+ drive_state[drive].last_checked = 0;
+ clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
+ &drive_state[drive].flags);
check_disk_change(bdev);
- if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
+ if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
goto out;
- if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags))
+ if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags))
goto out;
}
res = -EROFS;
if ((mode & FMODE_WRITE) &&
- !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags))
+ !test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags))
goto out;
}
mutex_unlock(&open_lock);
mutex_unlock(&floppy_mutex);
return 0;
out:
- UDRS->fd_ref--;
+ drive_state[drive].fd_ref--;
- if (!UDRS->fd_ref)
+ if (!drive_state[drive].fd_ref)
opened_bdev[drive] = NULL;
out2:
mutex_unlock(&open_lock);
@@ -4103,19 +4107,19 @@ static unsigned int floppy_check_events(struct gendisk *disk,
{
int drive = (long)disk->private_data;
- if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
- test_bit(FD_VERIFY_BIT, &UDRS->flags))
+ if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
+ test_bit(FD_VERIFY_BIT, &drive_state[drive].flags))
return DISK_EVENT_MEDIA_CHANGE;
- if (time_after(jiffies, UDRS->last_checked + drive_params[drive].checkfreq)) {
+ if (time_after(jiffies, drive_state[drive].last_checked + drive_params[drive].checkfreq)) {
if (lock_fdc(drive))
return 0;
poll_drive(false, 0);
process_fd_request();
}
- if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
- test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
+ if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
+ test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) ||
test_bit(drive, &fake_change) ||
drive_no_geom(drive))
return DISK_EVENT_MEDIA_CHANGE;
@@ -4141,7 +4145,7 @@ static void floppy_rb0_cb(struct bio *bio)
if (bio->bi_status) {
pr_info("floppy: error %d while reading block 0\n",
bio->bi_status);
- set_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
+ set_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags);
}
complete(&cbdata->complete);
}
@@ -4198,8 +4202,8 @@ static int floppy_revalidate(struct gendisk *disk)
int cf;
int res = 0;
- if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
- test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
+ if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
+ test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) ||
test_bit(drive, &fake_change) ||
drive_no_geom(drive)) {
if (WARN(atomic_read(&usage_count) == 0,
@@ -4209,20 +4213,20 @@ static int floppy_revalidate(struct gendisk *disk)
res = lock_fdc(drive);
if (res)
return res;
- cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
- test_bit(FD_VERIFY_BIT, &UDRS->flags));
+ cf = (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
+ test_bit(FD_VERIFY_BIT, &drive_state[drive].flags));
if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) {
process_fd_request(); /*already done by another thread */
return 0;
}
- UDRS->maxblock = 0;
- UDRS->maxtrack = 0;
+ drive_state[drive].maxblock = 0;
+ drive_state[drive].maxtrack = 0;
if (buffer_drive == drive)
buffer_track = -1;
clear_bit(drive, &fake_change);
- clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
+ clear_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
if (cf)
- UDRS->generation++;
+ drive_state[drive].generation++;
if (drive_no_geom(drive)) {
/* auto-sensing */
res = __floppy_read_block_0(opened_bdev[drive], drive);
@@ -4232,7 +4236,7 @@ static int floppy_revalidate(struct gendisk *disk)
process_fd_request();
}
}
- set_capacity(disk, floppy_sizes[UDRS->fd_device]);
+ set_capacity(disk, floppy_sizes[drive_state[drive].fd_device]);
return res;
}
@@ -4638,12 +4642,12 @@ static int __init do_floppy_init(void)
/* initialise drive state */
for (drive = 0; drive < N_DRIVE; drive++) {
- memset(UDRS, 0, sizeof(*UDRS));
+ memset(&drive_state[drive], 0, sizeof(drive_state[drive]));
memset(UDRWE, 0, sizeof(*UDRWE));
- set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
- set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
- set_bit(FD_VERIFY_BIT, &UDRS->flags);
- UDRS->fd_device = -1;
+ set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags);
+ set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
+ set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
+ drive_state[drive].fd_device = -1;
floppy_track_buffer = NULL;
max_buffer_sectors = 0;
}
--
2.9.0
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