/* * QNX4 file system, Linux implementation. * * Version : 0.2.1 * * Using parts of the xiafs filesystem. * * History : * * 28-05-1998 by Richard Frowijn : first release. * 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support. */ #include #include "qnx4.h" static int qnx4_readdir(struct file *file, struct dir_context *ctx) { struct inode *inode = file_inode(file); unsigned int offset; struct buffer_head *bh; struct qnx4_inode_entry *de; struct qnx4_link_info *le; unsigned long blknum; int ix, ino; int size; QNX4DEBUG((KERN_INFO "qnx4_readdir:i_size = %ld\n", (long) inode->i_size)); QNX4DEBUG((KERN_INFO "pos = %ld\n", (long) ctx->pos)); while (ctx->pos < inode->i_size) { blknum = qnx4_block_map(inode, ctx->pos >> QNX4_BLOCK_SIZE_BITS); bh = sb_bread(inode->i_sb, blknum); if (bh == NULL) { printk(KERN_ERR "qnx4_readdir: bread failed (%ld)\n", blknum); return 0; } ix = (ctx->pos >> QNX4_DIR_ENTRY_SIZE_BITS) % QNX4_INODES_PER_BLOCK; for (; ix < QNX4_INODES_PER_BLOCK; ix++, ctx->pos += QNX4_DIR_ENTRY_SIZE) { offset = ix * QNX4_DIR_ENTRY_SIZE; de = (struct qnx4_inode_entry *) (bh->b_data + offset); if (!de->di_fname[0]) continue; if (!(de->di_status & (QNX4_FILE_USED|QNX4_FILE_LINK))) continue; if (!(de->di_status & QNX4_FILE_LINK)) size = QNX4_SHORT_NAME_MAX; else size = QNX4_NAME_MAX; size = strnlen(de->di_fname, size); QNX4DEBUG((KERN_INFO "qnx4_readdir:%.*s\n", size, de->di_fname)); if (!(de->di_status & QNX4_FILE_LINK)) ino = blknum * QNX4_INODES_PER_BLOCK + ix - 1; else { le = (struct qnx4_link_info*)de; ino = ( le32_to_cpu(le->dl_inode_blk) - 1 ) * QNX4_INODES_PER_BLOCK + le->dl_inode_ndx; } if (!dir_emit(ctx, de->di_fname, size, ino, DT_UNKNOWN)) { brelse(bh); return 0; } } brelse(bh); } return 0; } const struct file_operations qnx4_dir_operations = { .llseek = generic_file_llseek, .read = generic_read_dir, .iterate_shared = qnx4_readdir, .fsync = generic_file_fsync, }; const struct inode_operations qnx4_dir_inode_operations = { .lookup = qnx4_lookup, }; cgi/linux/net-next.git/diff/tools/perf/builtin.h?h=nds-private-remove&id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>diff
path: root/tools/perf/builtin.h
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2017-01-31 09:37:34 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 21:47:58 +0100
commit0becc0ae5b42828785b589f686725ff5bc3b9b25 (patch)
treebe6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101 /tools/perf/builtin.h
parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'tools/perf/builtin.h')