From bdab18633a302c82b5e5d5dbc4e38b0baf9c0837 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 20 Sep 2026 08:15:23 -0700 Subject: Merge tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull futex fix from Ingo Molnar: - Also allocate a default private futex hash on vfork() as well, to avoid races with (private) futex waiters (Peter Zijlstra) * tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: futex: Also allocate private hash on vfork() --- fs/udf/lowlevel.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 fs/udf/lowlevel.c (limited to 'fs/udf/lowlevel.c') diff --git a/fs/udf/lowlevel.c b/fs/udf/lowlevel.c new file mode 100644 index 000000000..9d847a7a0 --- /dev/null +++ b/fs/udf/lowlevel.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * lowlevel.c + * + * PURPOSE + * Low Level Device Routines for the UDF filesystem + * + * COPYRIGHT + * (C) 1999-2001 Ben Fennema + * + * HISTORY + * + * 03/26/99 blf Created. + */ + +#include "udfdecl.h" + +#include +#include +#include + +#include "udf_sb.h" + +unsigned int udf_get_last_session(struct super_block *sb) +{ + struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk); + struct cdrom_multisession ms_info; + + if (!cdi) { + udf_debug("CDROMMULTISESSION not supported.\n"); + return 0; + } + + ms_info.addr_format = CDROM_LBA; + if (cdrom_multisession(cdi, &ms_info) == 0) { + udf_debug("XA disk: %s, vol_desc_start=%d\n", + ms_info.xa_flag ? "yes" : "no", ms_info.addr.lba); + if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */ + return ms_info.addr.lba; + } + return 0; +} + +udf_pblk_t udf_get_last_block(struct super_block *sb) +{ + struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk); + unsigned long lblock = 0; + + /* + * The cdrom layer call failed or returned obviously bogus value? + * Try using the device size... + */ + if (!cdi || cdrom_get_last_written(cdi, &lblock) || lblock == 0) { + if (sb_bdev_nr_blocks(sb) > ~(udf_pblk_t)0) + return 0; + lblock = sb_bdev_nr_blocks(sb); + } + + if (lblock) + return lblock - 1; + return 0; +} -- cgit v1.3.1