md/bitmap: convert some spin_lock_irqsave to spin_lock_irq

All of these sites can only be called from process context with
irqs enabled, so using irqsave/irqrestore just adds noise.
Remove it.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index f3a9dff..a1862d9 100644 (file)
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -737,10 +737,9 @@ static void bitmap_file_unmap(struct bitmap *bitmap)
        struct page **map, *sb_page;
        unsigned long *attr;
        int pages;
-       unsigned long flags;
        struct bitmap_storage *store = &bitmap->storage;
 
-       spin_lock_irqsave(&bitmap->lock, flags);
+       spin_lock_irq(&bitmap->lock);
        map = store->filemap;
        store->filemap = NULL;
        attr = store->filemap_attr;
@@ -749,7 +748,7 @@ static void bitmap_file_unmap(struct bitmap *bitmap)
        store->file_pages = 0;
        sb_page = store->sb_page;
        store->sb_page = NULL;
-       spin_unlock_irqrestore(&bitmap->lock, flags);
+       spin_unlock_irq(&bitmap->lock);
 
        while (pages--)
                if (map[pages] != sb_page) /* 0 is sb_page, release it below */
@@ -764,12 +763,11 @@ static void bitmap_file_unmap(struct bitmap *bitmap)
 static void bitmap_file_put(struct bitmap *bitmap)
 {
        struct file *file;
-       unsigned long flags;
 
-       spin_lock_irqsave(&bitmap->lock, flags);
+       spin_lock_irq(&bitmap->lock);
        file = bitmap->storage.file;
        bitmap->storage.file = NULL;
-       spin_unlock_irqrestore(&bitmap->lock, flags);
+       spin_unlock_irq(&bitmap->lock);
 
        if (file)
                wait_event(bitmap->write_wait,
@@ -901,7 +899,7 @@ static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
  * sync the dirty pages of the bitmap file to disk */
 void bitmap_unplug(struct bitmap *bitmap)
 {
-       unsigned long i, flags;
+       unsigned long i;
        int dirty, need_write;
        int wait = 0;
 
@@ -911,9 +909,9 @@ void bitmap_unplug(struct bitmap *bitmap)
        /* look at each page to see if there are any set bits that need to be
         * flushed out to disk */
        for (i = 0; i < bitmap->storage.file_pages; i++) {
-               spin_lock_irqsave(&bitmap->lock, flags);
+               spin_lock_irq(&bitmap->lock);
                if (!bitmap->storage.filemap) {
-                       spin_unlock_irqrestore(&bitmap->lock, flags);
+                       spin_unlock_irq(&bitmap->lock);
                        return;
                }
                dirty = test_page_attr(bitmap, i, BITMAP_PAGE_DIRTY);
@@ -924,7 +922,7 @@ void bitmap_unplug(struct bitmap *bitmap)
                        clear_page_attr(bitmap, i, BITMAP_PAGE_PENDING);
                if (dirty)
                        wait = 1;
-               spin_unlock_irqrestore(&bitmap->lock, flags);
+               spin_unlock_irq(&bitmap->lock);
 
                if (dirty || need_write)
                        write_page(bitmap, bitmap->storage.filemap[i], 0);
@@ -1129,7 +1127,6 @@ void bitmap_daemon_work(struct mddev *mddev)
        struct bitmap *bitmap;
        unsigned long j;
        unsigned long nextpage;
-       unsigned long flags;
        sector_t blocks;
 
        /* Use a mutex to guard daemon_work against
@@ -1156,7 +1153,7 @@ void bitmap_daemon_work(struct mddev *mddev)
         * So set NEEDWRITE now, then after we make any last-minute changes
         * we will write it.
         */
-       spin_lock_irqsave(&bitmap->lock, flags);
+       spin_lock_irq(&bitmap->lock);
        for (j = 0; j < bitmap->storage.file_pages; j++)
                if (test_page_attr(bitmap, j,
                                   BITMAP_PAGE_PENDING)) {
@@ -1235,14 +1232,14 @@ void bitmap_daemon_work(struct mddev *mddev)
                                   BITMAP_PAGE_NEEDWRITE)) {
                        clear_page_attr(bitmap, j,
                                        BITMAP_PAGE_NEEDWRITE);
-                       spin_unlock_irqrestore(&bitmap->lock, flags);
+                       spin_unlock_irq(&bitmap->lock);
                        write_page(bitmap, bitmap->storage.filemap[j], 0);
-                       spin_lock_irqsave(&bitmap->lock, flags);
+                       spin_lock_irq(&bitmap->lock);
                        if (!bitmap->storage.filemap)
                                break;
                }
        }
-       spin_unlock_irqrestore(&bitmap->lock, flags);
+       spin_unlock_irq(&bitmap->lock);
 
  done:
        if (bitmap->allclean == 0)
@@ -1815,12 +1812,11 @@ EXPORT_SYMBOL_GPL(bitmap_load);
 void bitmap_status(struct seq_file *seq, struct bitmap *bitmap)
 {
        unsigned long chunk_kb;
-       unsigned long flags;
 
        if (!bitmap)
                return;
 
-       spin_lock_irqsave(&bitmap->lock, flags);
+       spin_lock_irq(&bitmap->lock);
        chunk_kb = bitmap->mddev->bitmap_info.chunksize >> 10;
        seq_printf(seq, "bitmap: %lu/%lu pages [%luKB], "
                   "%lu%s chunk",
@@ -1836,7 +1832,7 @@ void bitmap_status(struct seq_file *seq, struct bitmap *bitmap)
        }
 
        seq_printf(seq, "\n");
-       spin_unlock_irqrestore(&bitmap->lock, flags);
+       spin_unlock_irq(&bitmap->lock);
 }
 
 static ssize_t