kgdb: fix optional arch functions and probe_kernel_*

[safe/jmp/linux-2.6] / fs / jbd2 / journal.c

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 3667c91..954cff0 100644 (file)
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -219,7 +219,7 @@ static int jbd2_journal_start_thread(journal_t *journal)
        if (IS_ERR(t))
                return PTR_ERR(t);
 
-       wait_event(journal->j_wait_done_commit, journal->j_task != 0);
+       wait_event(journal->j_wait_done_commit, journal->j_task != NULL);
        return 0;
 }
 
@@ -231,7 +231,7 @@ static void journal_kill_thread(journal_t *journal)
        while (journal->j_task) {
                wake_up(&journal->j_wait_commit);
                spin_unlock(&journal->j_state_lock);
-               wait_event(journal->j_wait_done_commit, journal->j_task == 0);
+               wait_event(journal->j_wait_done_commit, journal->j_task == NULL);
                spin_lock(&journal->j_state_lock);
        }
        spin_unlock(&journal->j_state_lock);
@@ -1578,6 +1578,32 @@ int jbd2_journal_set_features (journal_t *journal, unsigned long compat,
        return 1;
 }
 
+/*
+ * jbd2_journal_clear_features () - Clear a given journal feature in the
+ *                                 superblock
+ * @journal: Journal to act on.
+ * @compat: bitmask of compatible features
+ * @ro: bitmask of features that force read-only mount
+ * @incompat: bitmask of incompatible features
+ *
+ * Clear a given journal feature as present on the
+ * superblock.
+ */
+void jbd2_journal_clear_features(journal_t *journal, unsigned long compat,
+                               unsigned long ro, unsigned long incompat)
+{
+       journal_superblock_t *sb;
+
+       jbd_debug(1, "Clear features 0x%lx/0x%lx/0x%lx\n",
+                 compat, ro, incompat);
+
+       sb = journal->j_superblock;
+
+       sb->s_feature_compat    &= ~cpu_to_be32(compat);
+       sb->s_feature_ro_compat &= ~cpu_to_be32(ro);
+       sb->s_feature_incompat  &= ~cpu_to_be32(incompat);
+}
+EXPORT_SYMBOL(jbd2_journal_clear_features);
 
 /**
  * int jbd2_journal_update_format () - Update on-disk journal structure.
@@ -1943,14 +1969,14 @@ static int journal_init_jbd2_journal_head_cache(void)
 {
        int retval;
 
-       J_ASSERT(jbd2_journal_head_cache == 0);
+       J_ASSERT(jbd2_journal_head_cache == NULL);
        jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head",
                                sizeof(struct journal_head),
                                0,              /* offset */
-                               0,              /* flags */
+                               SLAB_TEMPORARY, /* flags */
                                NULL);          /* ctor */
        retval = 0;
-       if (jbd2_journal_head_cache == 0) {
+       if (!jbd2_journal_head_cache) {
                retval = -ENOMEM;
                printk(KERN_EMERG "JBD: no memory for journal_head cache\n");
        }
@@ -1976,14 +2002,14 @@ static struct journal_head *journal_alloc_journal_head(void)
        atomic_inc(&nr_journal_heads);
 #endif
        ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS);
-       if (ret == 0) {
+       if (!ret) {
                jbd_debug(1, "out of memory for journal_head\n");
                if (time_after(jiffies, last_warning + 5*HZ)) {
                        printk(KERN_NOTICE "ENOMEM in %s, retrying.\n",
                               __FUNCTION__);
                        last_warning = jiffies;
                }
-               while (ret == 0) {
+               while (!ret) {
                        yield();
                        ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS);
                }
@@ -2243,7 +2269,7 @@ static int __init journal_init_handle_cache(void)
        jbd2_handle_cache = kmem_cache_create("jbd2_journal_handle",
                                sizeof(handle_t),
                                0,              /* offset */
-                               0,              /* flags */
+                               SLAB_TEMPORARY, /* flags */
                                NULL);          /* ctor */
        if (jbd2_handle_cache == NULL) {
                printk(KERN_EMERG "JBD: failed to create handle cache\n");