Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull VFS updates from Al Viro,

Misc cleanups all over the place, mainly wrt /proc interfaces (switch
create_proc_entry to proc_create(), get rid of the deprecated
create_proc_read_entry() in favor of using proc_create_data() and
seq_file etc).

7kloc removed.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits)
  don't bother with deferred freeing of fdtables
  proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h
  proc: Make the PROC_I() and PDE() macros internal to procfs
  proc: Supply a function to remove a proc entry by PDE
  take cgroup_open() and cpuset_open() to fs/proc/base.c
  ppc: Clean up scanlog
  ppc: Clean up rtas_flash driver somewhat
  hostap: proc: Use remove_proc_subtree()
  drm: proc: Use remove_proc_subtree()
  drm: proc: Use minor->index to label things, not PDE->name
  drm: Constify drm_proc_list[]
  zoran: Don't print proc_dir_entry data in debug
  reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show()
  proc: Supply an accessor for getting the data from a PDE's parent
  airo: Use remove_proc_subtree()
  rtl8192u: Don't need to save device proc dir PDE
  rtl8187se: Use a dir under /proc/net/r8180/
  proc: Add proc_mkdir_data()
  proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h}
  proc: Move PDE_NET() to fs/proc/proc_net.c
  ...

5 files changed, 107 insertions, 138 deletions

diff --git a/arch/mips/kernel/smtc-proc.c b/arch/mips/kernel/smtc-proc.c
index aee7c8177b5d..9fb714450e95 100644
--- a/arch/mips/kernel/smtc-proc.c
+++ b/arch/mips/kernel/smtc-proc.c
@@ -16,6 +16,7 @@
 #include <asm/mipsregs.h>
 #include <asm/cacheflush.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 
 #include <asm/smtc_proc.h>
 
@@ -30,51 +31,39 @@ unsigned long selfipis[NR_CPUS];
 
 struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS];
 
-static struct proc_dir_entry *smtc_stats;
-
 atomic_t smtc_fpu_recoveries;
 
-static int proc_read_smtc(char *page, char **start, off_t off,
-                          int count, int *eof, void *data)
+static int smtc_proc_show(struct seq_file *m, void *v)
 {
-        int totalen = 0;
-        int len;
         int i;
         extern unsigned long ebase;
 
-        len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status);
-        totalen += len;
-        page += len;
-        len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7());
-        totalen += len;
-        page += len;
-        len = sprintf(page, "EBASE: 0x%08lx\n", ebase);
-        totalen += len;
-        page += len;
-        len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n");
-        totalen += len;
-        page += len;
-        for (i=0; i < NR_CPUS; i++) {
-                len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
-                totalen += len;
-                page += len;
-        }
-        len = sprintf(page, "Self-IPIs by CPU:\n");
-        totalen += len;
-        page += len;
-        for(i = 0; i < NR_CPUS; i++) {
-                len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
-                totalen += len;
-                page += len;
-        }
-        len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n",
-                      atomic_read(&smtc_fpu_recoveries));
-        totalen += len;
-        page += len;
+        seq_printf(m, "SMTC Status Word: 0x%08x\n", smtc_status);
+        seq_printf(m, "Config7: 0x%08x\n", read_c0_config7());
+        seq_printf(m, "EBASE: 0x%08lx\n", ebase);
+        seq_printf(m, "Counter Interrupts taken per CPU (TC)\n");
+        for (i=0; i < NR_CPUS; i++)
+                seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
+        seq_printf(m, "Self-IPIs by CPU:\n");
+        for(i = 0; i < NR_CPUS; i++)
+                seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
+        seq_printf(m, "%d Recoveries of \"stolen\" FPU\n",
+                   atomic_read(&smtc_fpu_recoveries));
+        return 0;
+}
 
-        return totalen;
+static int smtc_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, smtc_proc_show, NULL);
 }
 
+static const struct file_operations smtc_proc_fops = {
+        .open           = smtc_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
 void init_smtc_stats(void)
 {
         int i;
@@ -86,6 +75,5 @@ void init_smtc_stats(void)
 
         atomic_set(&smtc_fpu_recoveries, 0);
 
-        smtc_stats = create_proc_read_entry("smtc", 0444, NULL,
-                                            proc_read_smtc, NULL);
+        proc_create("smtc", 0444, NULL, &smtc_proc_fops);
 }
diff --git a/arch/mips/lasat/picvue_proc.c b/arch/mips/lasat/picvue_proc.c
index c592bc8b8c99..638c5db122c9 100644
--- a/arch/mips/lasat/picvue_proc.c
+++ b/arch/mips/lasat/picvue_proc.c
@@ -58,13 +58,13 @@ static int pvc_line_proc_show(struct seq_file *m, void *v)
 
 static int pvc_line_proc_open(struct inode *inode, struct file *file)
 {
-        return single_open(file, pvc_line_proc_show, PDE(inode)->data);
+        return single_open(file, pvc_line_proc_show, PDE_DATA(inode));
 }
 
 static ssize_t pvc_line_proc_write(struct file *file, const char __user *buf,
                                    size_t count, loff_t *pos)
 {
-        int lineno = *(int *)PDE(file_inode(file))->data;
+        int lineno = *(int *)PDE_DATA(file_inode(file));
         char kbuf[PVC_LINELEN];
         size_t len;
 
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 3d0346dbccf4..9b973e0af9cb 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -29,6 +29,7 @@
 #include <linux/pfn.h>
 #include <linux/hardirq.h>
 #include <linux/gfp.h>
+#include <linux/kcore.h>
 
 #include <asm/asm-offsets.h>
 #include <asm/bootinfo.h>
diff --git a/arch/mips/pci/ops-pmcmsp.c b/arch/mips/pci/ops-pmcmsp.c
index d0b6f8399b07..4eaab6327369 100644
--- a/arch/mips/pci/ops-pmcmsp.c
+++ b/arch/mips/pci/ops-pmcmsp.c
@@ -53,56 +53,51 @@ static void pci_proc_init(void);
 
 /*****************************************************************************
  *
- *  FUNCTION: read_msp_pci_counts
+ *  FUNCTION: show_msp_pci_counts
  *  _________________________________________________________________________
  *
  *  DESCRIPTION: Prints the count of how many times each PCI
  *               interrupt has asserted. Can be invoked by the
  *               /proc filesystem.
  *
- *  INPUTS:      page    - part of STDOUT calculation
- *               off     - part of STDOUT calculation
- *               count   - part of STDOUT calculation
- *               data    - unused
+ *  INPUTS:      m       - synthetic file construction data
+ *               v       - iterator
  *
- *  OUTPUTS:     start   - new start location
- *               eof     - end of file pointer
- *
- *  RETURNS:     len     - STDOUT length
+ *  RETURNS:     0 or error
  *
  ****************************************************************************/
-static int read_msp_pci_counts(char *page, char **start, off_t off,
-                                int count, int *eof, void *data)
+static int show_msp_pci_counts(struct seq_file *m, void *v)
 {
         int i;
-        int len = 0;
         unsigned int intcount, total = 0;
 
         for (i = 0; i < 32; ++i) {
                 intcount = pci_int_count[i];
                 if (intcount != 0) {
-                        len += sprintf(page + len, "[%d] = %u\n", i, intcount);
+                        seq_printf(m, "[%d] = %u\n", i, intcount);
                         total += intcount;
                 }
         }
 
-        len += sprintf(page + len, "total = %u\n", total);
-        if (len <= off+count)
-                *eof = 1;
-
-        *start = page + off;
-        len -= off;
-        if (len > count)
-                len = count;
-        if (len < 0)
-                len = 0;
+        seq_printf(m, "total = %u\n", total);
+        return 0;
+}
 
-        return len;
+static int msp_pci_rd_cnt_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, show_msp_pci_counts, NULL);
 }
 
+static const struct file_operations msp_pci_rd_cnt_fops = {
+        .open           = msp_pci_rd_cnt_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
 /*****************************************************************************
  *
- *  FUNCTION: gen_pci_cfg_wr
+ *  FUNCTION: gen_pci_cfg_wr_show
  *  _________________________________________________________________________
  *
  *  DESCRIPTION: Generates a configuration write cycle for debug purposes.
@@ -112,37 +107,30 @@ static int read_msp_pci_counts(char *page, char **start, off_t off,
  *               PCI bus.  Intent is that this function by invocable from
  *               the /proc filesystem.
  *
- *  INPUTS:      page    - part of STDOUT calculation
- *               off     - part of STDOUT calculation
- *               count   - part of STDOUT calculation
- *               data    - unused
+ *  INPUTS:      m       - synthetic file construction data
+ *               v       - iterator
  *
- *  OUTPUTS:     start   - new start location
- *               eof     - end of file pointer
- *
- *  RETURNS:     len     - STDOUT length
+ *  RETURNS:     0 or error
  *
  ****************************************************************************/
-static int gen_pci_cfg_wr(char *page, char **start, off_t off,
-                                int count, int *eof, void *data)
+static int gen_pci_cfg_wr_show(struct seq_file *m, void *v)
 {
         unsigned char where = 0; /* Write to static Device/Vendor ID */
         unsigned char bus_num = 0; /* Bus 0 */
         unsigned char dev_fn = 0xF; /* Arbitrary device number */
         u32 wr_data = 0xFF00AA00; /* Arbitrary data */
         struct msp_pci_regs *preg = (void *)PCI_BASE_REG;
-        int len = 0;
         unsigned long value;
         int intr;
 
-        len += sprintf(page + len, "PMC MSP PCI: Beginning\n");
+        seq_puts(m, "PMC MSP PCI: Beginning\n");
 
         if (proc_init == 0) {
                 pci_proc_init();
                 proc_init = ~0;
         }
 
-        len += sprintf(page + len, "PMC MSP PCI: Before Cfg Wr\n");
+        seq_puts(m, "PMC MSP PCI: Before Cfg Wr\n");
 
         /*
          * Generate PCI Configuration Write Cycle
@@ -168,21 +156,22 @@ static int gen_pci_cfg_wr(char *page, char **start, off_t off,
          */
         intr = preg->if_status;
 
-        len += sprintf(page + len, "PMC MSP PCI: After Cfg Wr\n");
-
-        /* Handle STDOUT calculations */
-        if (len <= off+count)
-                *eof = 1;
-        *start = page + off;
-        len -= off;
-        if (len > count)
-                len = count;
-        if (len < 0)
-                len = 0;
+        seq_puts(m, "PMC MSP PCI: After Cfg Wr\n");
+        return 0;
+}
 
-        return len;
+static int gen_pci_cfg_wr_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, gen_pci_cfg_wr_show, NULL);
 }
 
+static const struct file_operations gen_pci_cfg_wr_fops = {
+        .open           = gen_pci_cfg_wr_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
 /*****************************************************************************
  *
  *  FUNCTION: pci_proc_init
@@ -199,10 +188,8 @@ static int gen_pci_cfg_wr(char *page, char **start, off_t off,
  ****************************************************************************/
 static void pci_proc_init(void)
 {
-        create_proc_read_entry("pmc_msp_pci_rd_cnt", 0, NULL,
-                                read_msp_pci_counts, NULL);
-        create_proc_read_entry("pmc_msp_pci_cfg_wr", 0, NULL,
-                                gen_pci_cfg_wr, NULL);
+        proc_create("pmc_msp_pci_rd_cnt", 0, NULL, &msp_pci_rd_cnt_fops);
+        proc_create("pmc_msp_pci_cfg_wr", 0, NULL, &gen_pci_cfg_wr_fops);
 }
 #endif /* CONFIG_PROC_FS && PCI_COUNTERS */
 
diff --git a/arch/mips/sibyte/sb1250/bus_watcher.c b/arch/mips/sibyte/sb1250/bus_watcher.c
index e651105b3f0b..cb1e3cb37d70 100644
--- a/arch/mips/sibyte/sb1250/bus_watcher.c
+++ b/arch/mips/sibyte/sb1250/bus_watcher.c
@@ -30,6 +30,7 @@
 #include <linux/interrupt.h>
 #include <linux/sched.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <asm/io.h>
 
 #include <asm/sibyte/sb1250.h>
@@ -99,63 +100,60 @@ void check_bus_watcher(void)
                 printk("Bus watcher indicates no error\n");
 }
 
-static int bw_print_buffer(char *page, struct bw_stats_struct *stats)
+#ifdef CONFIG_PROC_FS
+
+/* For simplicity, I want to assume a single read is required each
+   time */
+static int bw_proc_show(struct seq_file *m, void *v)
 {
-        int len;
-
-        len = sprintf(page, "SiByte Bus Watcher statistics\n");
-        len += sprintf(page+len, "-----------------------------\n");
-        len += sprintf(page+len, "L2-d-cor %8ld\nL2-d-bad %8ld\n",
-                       stats->l2_cor_d, stats->l2_bad_d);
-        len += sprintf(page+len, "L2-t-cor %8ld\nL2-t-bad %8ld\n",
-                       stats->l2_cor_t, stats->l2_bad_t);
-        len += sprintf(page+len, "MC-d-cor %8ld\nMC-d-bad %8ld\n",
-                       stats->mem_cor_d, stats->mem_bad_d);
-        len += sprintf(page+len, "IO-err   %8ld\n", stats->bus_error);
-        len += sprintf(page+len, "\nLast recorded signature:\n");
-        len += sprintf(page+len, "Request %02x from %d, answered by %d with Dcode %d\n",
-                       (unsigned int)(G_SCD_BERR_TID(stats->status) & 0x3f),
-                       (int)(G_SCD_BERR_TID(stats->status) >> 6),
-                       (int)G_SCD_BERR_RID(stats->status),
-                       (int)G_SCD_BERR_DCODE(stats->status));
+        struct bw_stats_struct *stats = m->private;
+
+        seq_puts(m, "SiByte Bus Watcher statistics\n");
+        seq_puts(m, "-----------------------------\n");
+        seq_printf(m, "L2-d-cor %8ld\nL2-d-bad %8ld\n",
+                   stats->l2_cor_d, stats->l2_bad_d);
+        seq_printf(m, "L2-t-cor %8ld\nL2-t-bad %8ld\n",
+                   stats->l2_cor_t, stats->l2_bad_t);
+        seq_printf(m, "MC-d-cor %8ld\nMC-d-bad %8ld\n",
+                   stats->mem_cor_d, stats->mem_bad_d);
+        seq_printf(m, "IO-err   %8ld\n", stats->bus_error);
+        seq_puts(m, "\nLast recorded signature:\n");
+        seq_printf(m, "Request %02x from %d, answered by %d with Dcode %d\n",
+                   (unsigned int)(G_SCD_BERR_TID(stats->status) & 0x3f),
+                   (int)(G_SCD_BERR_TID(stats->status) >> 6),
+                   (int)G_SCD_BERR_RID(stats->status),
+                   (int)G_SCD_BERR_DCODE(stats->status));
         /* XXXKW indicate multiple errors between printings, or stats
            collection (or both)? */
         if (stats->status & M_SCD_BERR_MULTERRS)
-                len += sprintf(page+len, "Multiple errors observed since last check.\n");
+                seq_puts(m, "Multiple errors observed since last check.\n");
         if (stats->status_printed) {
-                len += sprintf(page+len, "(no change since last printing)\n");
+                seq_puts(m, "(no change since last printing)\n");
         } else {
                 stats->status_printed = 1;
         }
 
-        return len;
+        return 0;
 }
 
-#ifdef CONFIG_PROC_FS
-
-/* For simplicity, I want to assume a single read is required each
-   time */
-static int bw_read_proc(char *page, char **start, off_t off,
-                        int count, int *eof, void *data)
+static int bw_proc_open(struct inode *inode, struct file *file)
 {
-        int len;
-
-        if (off == 0) {
-                len = bw_print_buffer(page, data);
-                *start = page;
-        } else {
-                len = 0;
-                *eof = 1;
-        }
-        return len;
+        return single_open(file, bw_proc_show, PDE_DATA(inode));
 }
 
+static const struct file_operations bw_proc_fops = {
+        .open           = bw_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
 static void create_proc_decoder(struct bw_stats_struct *stats)
 {
         struct proc_dir_entry *ent;
 
-        ent = create_proc_read_entry("bus_watcher", S_IWUSR | S_IRUGO, NULL,
-                                     bw_read_proc, stats);
+        ent = proc_create_data("bus_watcher", S_IWUSR | S_IRUGO, NULL,
+                               &bw_proc_fops, stats);
         if (!ent) {
                 printk(KERN_INFO "Unable to initialize bus_watcher /proc entry\n");
                 return;
@@ -210,11 +208,6 @@ static irqreturn_t sibyte_bw_int(int irq, void *data)
         stats->bus_error += G_SCD_MEM_BUSERR(cntr);
         csr_out32(0, IOADDR(A_BUS_MEM_IO_ERRORS));
 
-#ifndef CONFIG_PROC_FS
-        bw_print_buffer(bw_buf, stats);
-        printk(bw_buf);
-#endif
-
         return IRQ_HANDLED;
 }