fs/proc/proc_misc.c

   1 /*
   2  *  linux/fs/proc/proc_misc.c
   3  *
   4  *  linux/fs/proc/array.c
   5  *  Copyright (C) 1992  by Linus Torvalds
   6  *  based on ideas by Darren Senn
   7  *
   8  *  This used to be the part of array.c. See the rest of history and credits
   9  *  there. I took this into a separate file and switched the thing to generic
  10  *  proc_file_inode_operations, leaving in array.c only per-process stuff.
  11  *  Inumbers allocation made dynamic (via create_proc_entry()).  AV, May 1999.
  12  *
  13  * Changes:
  14  * Fulton Green      :  Encapsulated position metric calculations.
  15  *                      <kernel@FultonGreen.com>
  16  */
  17
  18 #include <linux/types.h>
  19 #include <linux/errno.h>
  20 #include <linux/time.h>
  21 #include <linux/kernel.h>
  22 #include <linux/kernel_stat.h>
  23 #include <linux/tty.h>
  24 #include <linux/string.h>
  25 #include <linux/mman.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/ioport.h>
  28 #include <linux/config.h>
  29 #include <linux/mm.h>
  30 #include <linux/mmzone.h>
  31 #include <linux/pagemap.h>
  32 #include <linux/swap.h>
  33 #include <linux/slab.h>
  34 #include <linux/smp.h>
  35 #include <linux/signal.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/smp_lock.h>
  39 #include <linux/seq_file.h>
  40 #include <linux/times.h>
  41 #include <linux/profile.h>
  42 #include <linux/blkdev.h>
  43 #include <linux/hugetlb.h>
  44 #include <linux/jiffies.h>
  45 #include <linux/sysrq.h>
  46 #include <linux/vmalloc.h>
  47 #include <linux/vs_base.h>
  48 #include <linux/vs_cvirt.h>
  49
  50 #include <asm/uaccess.h>
  51 #include <asm/pgtable.h>
  52 #include <asm/io.h>
  53 #include <asm/tlb.h>
  54 #include <asm/div64.h>
  55
  56 #define LOAD_INT(x) ((x) >> FSHIFT)
  57 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  58 /*
  59  * Warning: stuff below (imported functions) assumes that its output will fit
  60  * into one page. For some of those functions it may be wrong. Moreover, we
  61  * have a way to deal with that gracefully. Right now I used straightforward
  62  * wrappers, but this needs further analysis wrt potential overflows.
  63  */
  64 extern int get_hardware_list(char *);
  65 extern int get_stram_list(char *);
  66 extern int get_chrdev_list(char *);
  67 extern int get_blkdev_list(char *);
  68 extern int get_filesystem_list(char *);
  69 extern int get_exec_domain_list(char *);
  70 extern int get_dma_list(char *);
  71 extern int get_locks_status (char *, char **, off_t, int);
  72
  73 static int proc_calc_metrics(char *page, char **start, off_t off,
  74                                  int count, int *eof, int len)
  75 {
  76         if (len <= off+count) *eof = 1;
  77         *start = page + off;
  78         len -= off;
  79         if (len>count) len = count;
  80         if (len<0) len = 0;
  81         return len;
  82 }
  83
  84 static int loadavg_read_proc(char *page, char **start, off_t off,
  85                                  int count, int *eof, void *data)
  86 {
  87         unsigned int running, threads;
  88         int a, b, c;
  89         int len;
  90
  91         if (vx_flags(VXF_VIRT_LOAD, 0)) {
  92                 struct vx_info *vxi = current->vx_info;
  93
  94                 a = vxi->cvirt.load[0] + (FIXED_1/200);
  95                 b = vxi->cvirt.load[1] + (FIXED_1/200);
  96                 c = vxi->cvirt.load[2] + (FIXED_1/200);
  97
  98                 running = atomic_read(&vxi->cvirt.nr_running);
  99                 threads = atomic_read(&vxi->cvirt.nr_threads);
 100         } else {
 101                 a = avenrun[0] + (FIXED_1/200);
 102                 b = avenrun[1] + (FIXED_1/200);
 103                 c = avenrun[2] + (FIXED_1/200);
 104
 105                 running = nr_running();
 106                 threads = nr_threads;
 107         }
 108         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %d/%d %d\n",
 109                 LOAD_INT(a), LOAD_FRAC(a),
 110                 LOAD_INT(b), LOAD_FRAC(b),
 111                 LOAD_INT(c), LOAD_FRAC(c),
 112                 running, threads, last_pid);
 113         return proc_calc_metrics(page, start, off, count, eof, len);
 114 }
 115
 116 struct vmalloc_info {
 117         unsigned long used;
 118         unsigned long largest_chunk;
 119 };
 120
 121 static struct vmalloc_info get_vmalloc_info(void)
 122 {
 123         unsigned long prev_end = VMALLOC_START;
 124         struct vm_struct* vma;
 125         struct vmalloc_info vmi;
 126         vmi.used = 0;
 127
 128         read_lock(&vmlist_lock);
 129
 130         if(!vmlist)
 131                 vmi.largest_chunk = (VMALLOC_END-VMALLOC_START);
 132         else
 133                 vmi.largest_chunk = 0;
 134
 135         for (vma = vmlist; vma; vma = vma->next) {
 136                 unsigned long free_area_size =
 137                         (unsigned long)vma->addr - prev_end;
 138                 vmi.used += vma->size;
 139                 if (vmi.largest_chunk < free_area_size )
 140
 141                         vmi.largest_chunk = free_area_size;
 142                 prev_end = vma->size + (unsigned long)vma->addr;
 143         }
 144         if(VMALLOC_END-prev_end > vmi.largest_chunk)
 145                 vmi.largest_chunk = VMALLOC_END-prev_end;
 146
 147         read_unlock(&vmlist_lock);
 148         return vmi;
 149 }
 150
 151 static int uptime_read_proc(char *page, char **start, off_t off,
 152                                  int count, int *eof, void *data)
 153 {
 154         struct timespec uptime;
 155         struct timespec idle;
 156         int len;
 157         u64 idle_jiffies = init_task.utime + init_task.stime;
 158
 159         do_posix_clock_monotonic_gettime(&uptime);
 160         jiffies_to_timespec(idle_jiffies, &idle);
 161         if (vx_flags(VXF_VIRT_UPTIME, 0))
 162                 vx_vsi_uptime(&uptime, &idle);
 163
 164         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 165                         (unsigned long) uptime.tv_sec,
 166                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
 167                         (unsigned long) idle.tv_sec,
 168                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
 169
 170         return proc_calc_metrics(page, start, off, count, eof, len);
 171 }
 172
 173 static int meminfo_read_proc(char *page, char **start, off_t off,
 174                                  int count, int *eof, void *data)
 175 {
 176         struct sysinfo i;
 177         int len, committed;
 178         struct page_state ps;
 179         unsigned long inactive;
 180         unsigned long active;
 181         unsigned long free;
 182         unsigned long vmtot;
 183         struct vmalloc_info vmi;
 184
 185         get_page_state(&ps);
 186         get_zone_counts(&active, &inactive, &free);
 187
 188 /*
 189  * display in kilobytes.
 190  */
 191 #define K(x) ((x) << (PAGE_SHIFT - 10))
 192         si_meminfo(&i);
 193         si_swapinfo(&i);
 194         committed = atomic_read(&vm_committed_space);
 195
 196         vmtot = (VMALLOC_END-VMALLOC_START)>>10;
 197         vmi = get_vmalloc_info();
 198         vmi.used >>= 10;
 199         vmi.largest_chunk >>= 10;
 200
 201         /*
 202          * Tagged format, for easy grepping and expansion.
 203          */
 204         len = sprintf(page,
 205                 "MemTotal:     %8lu kB\n"
 206                 "MemFree:      %8lu kB\n"
 207                 "Buffers:      %8lu kB\n"
 208                 "Cached:       %8lu kB\n"
 209                 "SwapCached:   %8lu kB\n"
 210                 "Active:       %8lu kB\n"
 211                 "Inactive:     %8lu kB\n"
 212                 "HighTotal:    %8lu kB\n"
 213                 "HighFree:     %8lu kB\n"
 214                 "LowTotal:     %8lu kB\n"
 215                 "LowFree:      %8lu kB\n"
 216                 "SwapTotal:    %8lu kB\n"
 217                 "SwapFree:     %8lu kB\n"
 218                 "Dirty:        %8lu kB\n"
 219                 "Writeback:    %8lu kB\n"
 220                 "Mapped:       %8lu kB\n"
 221                 "Slab:         %8lu kB\n"
 222                 "Committed_AS: %8u kB\n"
 223                 "PageTables:   %8lu kB\n"
 224                 "VmallocTotal: %8lu kB\n"
 225                 "VmallocUsed:  %8lu kB\n"
 226                 "VmallocChunk: %8lu kB\n",
 227                 K(i.totalram),
 228                 K(i.freeram),
 229                 K(i.bufferram),
 230                 K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
 231                 K(total_swapcache_pages),
 232                 K(active),
 233                 K(inactive),
 234                 K(i.totalhigh),
 235                 K(i.freehigh),
 236                 K(i.totalram-i.totalhigh),
 237                 K(i.freeram-i.freehigh),
 238                 K(i.totalswap),
 239                 K(i.freeswap),
 240                 K(ps.nr_dirty),
 241                 K(ps.nr_writeback),
 242                 K(ps.nr_mapped),
 243                 K(ps.nr_slab),
 244                 K(committed),
 245                 K(ps.nr_page_table_pages),
 246                 vmtot,
 247                 vmi.used,
 248                 vmi.largest_chunk
 249                 );
 250
 251                 len += hugetlb_report_meminfo(page + len);
 252
 253         return proc_calc_metrics(page, start, off, count, eof, len);
 254 #undef K
 255 }
 256
 257 extern struct seq_operations fragmentation_op;
 258 static int fragmentation_open(struct inode *inode, struct file *file)
 259 {
 260         (void)inode;
 261         return seq_open(file, &fragmentation_op);
 262 }
 263
 264 static struct file_operations fragmentation_file_operations = {
 265         .open           = fragmentation_open,
 266         .read           = seq_read,
 267         .llseek         = seq_lseek,
 268         .release        = seq_release,
 269 };
 270
 271 static int version_read_proc(char *page, char **start, off_t off,
 272                                  int count, int *eof, void *data)
 273 {
 274         extern char *linux_banner;
 275         int len;
 276
 277         strcpy(page, linux_banner);
 278         len = strlen(page);
 279         return proc_calc_metrics(page, start, off, count, eof, len);
 280 }
 281
 282 extern struct seq_operations cpuinfo_op;
 283 static int cpuinfo_open(struct inode *inode, struct file *file)
 284 {
 285         return seq_open(file, &cpuinfo_op);
 286 }
 287 static struct file_operations proc_cpuinfo_operations = {
 288         .open           = cpuinfo_open,
 289         .read           = seq_read,
 290         .llseek         = seq_lseek,
 291         .release        = seq_release,
 292 };
 293
 294 extern struct seq_operations vmstat_op;
 295 static int vmstat_open(struct inode *inode, struct file *file)
 296 {
 297         return seq_open(file, &vmstat_op);
 298 }
 299 static struct file_operations proc_vmstat_file_operations = {
 300         .open           = vmstat_open,
 301         .read           = seq_read,
 302         .llseek         = seq_lseek,
 303         .release        = seq_release,
 304 };
 305
 306 #ifdef CONFIG_PROC_HARDWARE
 307 static int hardware_read_proc(char *page, char **start, off_t off,
 308                                  int count, int *eof, void *data)
 309 {
 310         int len = get_hardware_list(page);
 311         return proc_calc_metrics(page, start, off, count, eof, len);
 312 }
 313 #endif
 314
 315 #ifdef CONFIG_STRAM_PROC
 316 static int stram_read_proc(char *page, char **start, off_t off,
 317                                  int count, int *eof, void *data)
 318 {
 319         int len = get_stram_list(page);
 320         return proc_calc_metrics(page, start, off, count, eof, len);
 321 }
 322 #endif
 323
 324 extern struct seq_operations partitions_op;
 325 static int partitions_open(struct inode *inode, struct file *file)
 326 {
 327         return seq_open(file, &partitions_op);
 328 }
 329 static struct file_operations proc_partitions_operations = {
 330         .open           = partitions_open,
 331         .read           = seq_read,
 332         .llseek         = seq_lseek,
 333         .release        = seq_release,
 334 };
 335
 336 extern struct seq_operations diskstats_op;
 337 static int diskstats_open(struct inode *inode, struct file *file)
 338 {
 339         return seq_open(file, &diskstats_op);
 340 }
 341 static struct file_operations proc_diskstats_operations = {
 342         .open           = diskstats_open,
 343         .read           = seq_read,
 344         .llseek         = seq_lseek,
 345         .release        = seq_release,
 346 };
 347
 348 #ifdef CONFIG_MODULES
 349 extern struct seq_operations modules_op;
 350 static int modules_open(struct inode *inode, struct file *file)
 351 {
 352         return seq_open(file, &modules_op);
 353 }
 354 static struct file_operations proc_modules_operations = {
 355         .open           = modules_open,
 356         .read           = seq_read,
 357         .llseek         = seq_lseek,
 358         .release        = seq_release,
 359 };
 360 #endif
 361
 362 extern struct seq_operations slabinfo_op;
 363 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 364 static int slabinfo_open(struct inode *inode, struct file *file)
 365 {
 366         return seq_open(file, &slabinfo_op);
 367 }
 368 static struct file_operations proc_slabinfo_operations = {
 369         .open           = slabinfo_open,
 370         .read           = seq_read,
 371         .write          = slabinfo_write,
 372         .llseek         = seq_lseek,
 373         .release        = seq_release,
 374 };
 375
 376 int show_stat(struct seq_file *p, void *v)
 377 {
 378         int i;
 379         extern unsigned long total_forks;
 380         unsigned long jif;
 381         u64     sum = 0, user = 0, nice = 0, system = 0,
 382                 idle = 0, iowait = 0, irq = 0, softirq = 0;
 383
 384         jif = - wall_to_monotonic.tv_sec;
 385         if (wall_to_monotonic.tv_nsec)
 386                 --jif;
 387
 388         for_each_cpu(i) {
 389                 int j;
 390
 391                 user += kstat_cpu(i).cpustat.user;
 392                 nice += kstat_cpu(i).cpustat.nice;
 393                 system += kstat_cpu(i).cpustat.system;
 394                 idle += kstat_cpu(i).cpustat.idle;
 395                 iowait += kstat_cpu(i).cpustat.iowait;
 396                 irq += kstat_cpu(i).cpustat.irq;
 397                 softirq += kstat_cpu(i).cpustat.softirq;
 398                 for (j = 0 ; j < NR_IRQS ; j++)
 399                         sum += kstat_cpu(i).irqs[j];
 400         }
 401
 402         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu\n",
 403                 (unsigned long long)jiffies_64_to_clock_t(user),
 404                 (unsigned long long)jiffies_64_to_clock_t(nice),
 405                 (unsigned long long)jiffies_64_to_clock_t(system),
 406                 (unsigned long long)jiffies_64_to_clock_t(idle),
 407                 (unsigned long long)jiffies_64_to_clock_t(iowait),
 408                 (unsigned long long)jiffies_64_to_clock_t(irq),
 409                 (unsigned long long)jiffies_64_to_clock_t(softirq));
 410         for_each_online_cpu(i) {
 411
 412                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 413                 user = kstat_cpu(i).cpustat.user;
 414                 nice = kstat_cpu(i).cpustat.nice;
 415                 system = kstat_cpu(i).cpustat.system;
 416                 idle = kstat_cpu(i).cpustat.idle;
 417                 iowait = kstat_cpu(i).cpustat.iowait;
 418                 irq = kstat_cpu(i).cpustat.irq;
 419                 softirq = kstat_cpu(i).cpustat.softirq;
 420                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu\n",
 421                         i,
 422                         (unsigned long long)jiffies_64_to_clock_t(user),
 423                         (unsigned long long)jiffies_64_to_clock_t(nice),
 424                         (unsigned long long)jiffies_64_to_clock_t(system),
 425                         (unsigned long long)jiffies_64_to_clock_t(idle),
 426                         (unsigned long long)jiffies_64_to_clock_t(iowait),
 427                         (unsigned long long)jiffies_64_to_clock_t(irq),
 428                         (unsigned long long)jiffies_64_to_clock_t(softirq));
 429         }
 430         seq_printf(p, "intr %llu", (unsigned long long)sum);
 431
 432 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
 433         for (i = 0; i < NR_IRQS; i++)
 434                 seq_printf(p, " %u", kstat_irqs(i));
 435 #endif
 436
 437         seq_printf(p,
 438                 "\nctxt %llu\n"
 439                 "btime %lu\n"
 440                 "processes %lu\n"
 441                 "procs_running %lu\n"
 442                 "procs_blocked %lu\n",
 443                 nr_context_switches(),
 444                 (unsigned long)jif,
 445                 total_forks,
 446                 nr_running(),
 447                 nr_iowait());
 448
 449         return 0;
 450 }
 451
 452 static int stat_open(struct inode *inode, struct file *file)
 453 {
 454         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 455         char *buf;
 456         struct seq_file *m;
 457         int res;
 458
 459         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 460         if (size > 128 * 1024)
 461                 size = 128 * 1024;
 462         buf = kmalloc(size, GFP_KERNEL);
 463         if (!buf)
 464                 return -ENOMEM;
 465
 466         res = single_open(file, show_stat, NULL);
 467         if (!res) {
 468                 m = file->private_data;
 469                 m->buf = buf;
 470                 m->size = size;
 471         } else
 472                 kfree(buf);
 473         return res;
 474 }
 475 static struct file_operations proc_stat_operations = {
 476         .open           = stat_open,
 477         .read           = seq_read,
 478         .llseek         = seq_lseek,
 479         .release        = single_release,
 480 };
 481
 482 static int devices_read_proc(char *page, char **start, off_t off,
 483                                  int count, int *eof, void *data)
 484 {
 485         int len = get_chrdev_list(page);
 486         len += get_blkdev_list(page+len);
 487         return proc_calc_metrics(page, start, off, count, eof, len);
 488 }
 489
 490 /*
 491  * /proc/interrupts
 492  */
 493 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 494 {
 495         return (*pos <= NR_IRQS) ? pos : NULL;
 496 }
 497
 498 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 499 {
 500         (*pos)++;
 501         if (*pos > NR_IRQS)
 502                 return NULL;
 503         return pos;
 504 }
 505
 506 static void int_seq_stop(struct seq_file *f, void *v)
 507 {
 508         /* Nothing to do */
 509 }
 510
 511
 512 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 513 static struct seq_operations int_seq_ops = {
 514         .start = int_seq_start,
 515         .next  = int_seq_next,
 516         .stop  = int_seq_stop,
 517         .show  = show_interrupts
 518 };
 519
 520 int interrupts_open(struct inode *inode, struct file *filp)
 521 {
 522         return seq_open(filp, &int_seq_ops);
 523 }
 524
 525 static struct file_operations proc_interrupts_operations = {
 526         .open           = interrupts_open,
 527         .read           = seq_read,
 528         .llseek         = seq_lseek,
 529         .release        = seq_release,
 530 };
 531
 532 static int filesystems_read_proc(char *page, char **start, off_t off,
 533                                  int count, int *eof, void *data)
 534 {
 535         int len = get_filesystem_list(page);
 536         return proc_calc_metrics(page, start, off, count, eof, len);
 537 }
 538
 539 static int cmdline_read_proc(char *page, char **start, off_t off,
 540                                  int count, int *eof, void *data)
 541 {
 542         int len;
 543
 544         len = sprintf(page, "%s\n", saved_command_line);
 545         return proc_calc_metrics(page, start, off, count, eof, len);
 546 }
 547
 548 static int locks_read_proc(char *page, char **start, off_t off,
 549                                  int count, int *eof, void *data)
 550 {
 551         int len = get_locks_status(page, start, off, count);
 552
 553         if (len < count)
 554                 *eof = 1;
 555         return len;
 556 }
 557
 558 static int execdomains_read_proc(char *page, char **start, off_t off,
 559                                  int count, int *eof, void *data)
 560 {
 561         int len = get_exec_domain_list(page);
 562         return proc_calc_metrics(page, start, off, count, eof, len);
 563 }
 564
 565 #ifdef CONFIG_MAGIC_SYSRQ
 566 /*
 567  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 568  */
 569 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 570                                    size_t count, loff_t *ppos)
 571 {
 572         if (count) {
 573                 char c;
 574
 575                 if (get_user(c, buf))
 576                         return -EFAULT;
 577                 __handle_sysrq(c, NULL, NULL);
 578         }
 579         return count;
 580 }
 581
 582 static struct file_operations proc_sysrq_trigger_operations = {
 583         .write          = write_sysrq_trigger,
 584 };
 585 #endif
 586
 587 struct proc_dir_entry *proc_root_kcore;
 588
 589 static void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
 590 {
 591         struct proc_dir_entry *entry;
 592         entry = create_proc_entry(name, mode, NULL);
 593         if (entry)
 594                 entry->proc_fops = f;
 595 }
 596
 597 void __init proc_misc_init(void)
 598 {
 599         struct proc_dir_entry *entry;
 600         static struct {
 601                 char *name;
 602                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 603         } *p, simple_ones[] = {
 604                 {"loadavg",     loadavg_read_proc},
 605                 {"uptime",      uptime_read_proc},
 606                 {"meminfo",     meminfo_read_proc},
 607                 {"version",     version_read_proc},
 608 #ifdef CONFIG_PROC_HARDWARE
 609                 {"hardware",    hardware_read_proc},
 610 #endif
 611 #ifdef CONFIG_STRAM_PROC
 612                 {"stram",       stram_read_proc},
 613 #endif
 614                 {"devices",     devices_read_proc},
 615                 {"filesystems", filesystems_read_proc},
 616                 {"cmdline",     cmdline_read_proc},
 617                 {"locks",       locks_read_proc},
 618                 {"execdomains", execdomains_read_proc},
 619                 {NULL,}
 620         };
 621         for (p = simple_ones; p->name; p++)
 622                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 623
 624         proc_symlink("mounts", NULL, "self/mounts");
 625
 626         /* And now for trickier ones */
 627         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 628         if (entry)
 629                 entry->proc_fops = &proc_kmsg_operations;
 630         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 631         create_seq_entry("partitions", 0, &proc_partitions_operations);
 632         create_seq_entry("stat", 0, &proc_stat_operations);
 633         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 634         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 635         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 636         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 637         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 638 #ifdef CONFIG_MODULES
 639         create_seq_entry("modules", 0, &proc_modules_operations);
 640 #endif
 641 #ifdef CONFIG_SCHEDSTATS
 642         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
 643 #endif
 644 #ifdef CONFIG_PROC_KCORE
 645         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 646         if (proc_root_kcore) {
 647                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 648                 proc_root_kcore->size =
 649                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 650         }
 651 #endif
 652 #ifdef CONFIG_MAGIC_SYSRQ
 653         entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 654         if (entry)
 655                 entry->proc_fops = &proc_sysrq_trigger_operations;
 656 #endif
 657 #ifdef CONFIG_PPC32
 658         {
 659                 extern struct file_operations ppc_htab_operations;
 660                 entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
 661                 if (entry)
 662                         entry->proc_fops = &ppc_htab_operations;
 663         }
 664 #endif
 665 }