mdadm/0020-bitmap.h-clear-__KERNEL__-based-headers.patch

From eb9876f58658a107705a689852110903723e4d3b Mon Sep 17 00:00:00 2001
From: Mariusz Tkaczyk <mtkaczyk@kernel.org>
Date: Mon, 3 Feb 2025 11:36:01 +0100
Subject: [PATCH 20/39] bitmap.h - clear __KERNEL__ based headers

It is unused for years. Clear it.

Signed-off-by: Mariusz Tkaczyk <mtkaczyk@kernel.org>
---
 bitmap.h | 169 -------------------------------------------------------
 1 file changed, 169 deletions(-)

diff --git a/bitmap.h b/bitmap.h
index 7b1f80f2..2614a14e 100644
--- a/bitmap.h
+++ b/bitmap.h
@@ -78,63 +78,6 @@
  *
  */
 
-#ifdef __KERNEL__
-
-#define PAGE_BITS (PAGE_SIZE << 3)
-#define PAGE_BIT_SHIFT (PAGE_SHIFT + 3)
-
-typedef __u16 bitmap_counter_t;
-#define COUNTER_BITS 16
-#define COUNTER_BIT_SHIFT 4
-#define COUNTER_BYTE_RATIO (COUNTER_BITS / 8)
-#define COUNTER_BYTE_SHIFT (COUNTER_BIT_SHIFT - 3)
-
-#define NEEDED_MASK ((bitmap_counter_t) (1 << (COUNTER_BITS - 1)))
-#define RESYNC_MASK ((bitmap_counter_t) (1 << (COUNTER_BITS - 2)))
-#define COUNTER_MAX ((bitmap_counter_t) RESYNC_MASK - 1)
-#define NEEDED(x) (((bitmap_counter_t) x) & NEEDED_MASK)
-#define RESYNC(x) (((bitmap_counter_t) x) & RESYNC_MASK)
-#define COUNTER(x) (((bitmap_counter_t) x) & COUNTER_MAX)
-
-/* how many counters per page? */
-#define PAGE_COUNTER_RATIO (PAGE_BITS / COUNTER_BITS)
-/* same, except a shift value for more efficient bitops */
-#define PAGE_COUNTER_SHIFT (PAGE_BIT_SHIFT - COUNTER_BIT_SHIFT)
-/* same, except a mask value for more efficient bitops */
-#define PAGE_COUNTER_MASK  (PAGE_COUNTER_RATIO - 1)
-
-#define BITMAP_BLOCK_SIZE 512
-#define BITMAP_BLOCK_SHIFT 9
-
-/* how many blocks per chunk? (this is variable) */
-#define CHUNK_BLOCK_RATIO(bitmap) ((bitmap)->chunksize >> BITMAP_BLOCK_SHIFT)
-#define CHUNK_BLOCK_SHIFT(bitmap) ((bitmap)->chunkshift - BITMAP_BLOCK_SHIFT)
-#define CHUNK_BLOCK_MASK(bitmap) (CHUNK_BLOCK_RATIO(bitmap) - 1)
-
-/* when hijacked, the counters and bits represent even larger "chunks" */
-/* there will be 1024 chunks represented by each counter in the page pointers */
-#define PAGEPTR_BLOCK_RATIO(bitmap) \
-			(CHUNK_BLOCK_RATIO(bitmap) << PAGE_COUNTER_SHIFT >> 1)
-#define PAGEPTR_BLOCK_SHIFT(bitmap) \
-			(CHUNK_BLOCK_SHIFT(bitmap) + PAGE_COUNTER_SHIFT - 1)
-#define PAGEPTR_BLOCK_MASK(bitmap) (PAGEPTR_BLOCK_RATIO(bitmap) - 1)
-
-/*
- * on-disk bitmap:
- *
- * Use one bit per "chunk" (block set). We do the disk I/O on the bitmap
- * file a page at a time. There's a superblock at the start of the file.
- */
-
-/* map chunks (bits) to file pages - offset by the size of the superblock */
-#define CHUNK_BIT_OFFSET(chunk) ((chunk) + (sizeof(bitmap_super_t) << 3))
-
-#endif
-
-/*
- * bitmap structures:
- */
-
 #define BITMAP_MAGIC 0x6d746962
 
 /* use these for bitmap->flags and bitmap->sb->state bit-fields */
@@ -176,116 +119,4 @@ typedef struct bitmap_super_s {
  *    devices.  For raid10 it is the size of the array.
  */
 
-#ifdef __KERNEL__
-
-/* the in-memory bitmap is represented by bitmap_pages */
-struct bitmap_page {
-	/*
-	 * map points to the actual memory page
-	 */
-	char *map;
-	/*
-	 * in emergencies (when map cannot be allocated), hijack the map
-	 * pointer and use it as two counters itself
-	 */
-	unsigned int hijacked;
-	/*
-	 * count of dirty bits on the page
-	 */
-	int count;
-};
-
-/* keep track of bitmap file pages that have pending writes on them */
-struct page_list {
-	struct list_head list;
-	struct page *page;
-};
-
-/* the main bitmap structure - one per mddev */
-struct bitmap {
-	struct bitmap_page *bp;
-	unsigned long pages; /* total number of pages in the bitmap */
-	unsigned long missing_pages; /* number of pages not yet allocated */
-
-	mddev_t *mddev; /* the md device that the bitmap is for */
-
-	int counter_bits; /* how many bits per block counter */
-
-	/* bitmap chunksize -- how much data does each bit represent? */
-	unsigned long chunksize;
-	unsigned long chunkshift; /* chunksize = 2^chunkshift (for bitops) */
-	unsigned long chunks; /* total number of data chunks for the array */
-
-	/* We hold a count on the chunk currently being synced, and drop
-	 * it when the last block is started.  If the resync is aborted
-	 * midway, we need to be able to drop that count, so we remember
-	 * the counted chunk..
-	 */
-	unsigned long syncchunk;
-
-	__u64	events_cleared;
-
-	/* bitmap spinlock */
-	spinlock_t lock;
-
-	struct file *file; /* backing disk file */
-	struct page *sb_page; /* cached copy of the bitmap file superblock */
-	struct page **filemap; /* list of cache pages for the file */
-	unsigned long *filemap_attr; /* attributes associated w/ filemap pages */
-	unsigned long file_pages; /* number of pages in the file */
-
-	unsigned long flags;
-
-	/*
-	 * the bitmap daemon - periodically wakes up and sweeps the bitmap
-	 * file, cleaning up bits and flushing out pages to disk as necessary
-	 */
-	mdk_thread_t *daemon;
-	unsigned long daemon_sleep; /* how many seconds between updates? */
-
-	/*
-	 * bitmap write daemon - this daemon performs writes to the bitmap file
-	 * this thread is only needed because of a limitation in ext3 (jbd)
-	 * that does not allow a task to have two journal transactions ongoing
-	 * simultaneously (even if the transactions are for two different
-	 * filesystems) -- in the case of bitmap, that would be the filesystem
-	 * that the bitmap file resides on and the filesystem that is mounted
-	 * on the md device -- see current->journal_info in jbd/transaction.c
-	 */
-	mdk_thread_t *write_daemon;
-	mdk_thread_t *writeback_daemon;
-	spinlock_t write_lock;
-	struct semaphore write_ready;
-	struct semaphore write_done;
-	unsigned long writes_pending;
-	wait_queue_head_t write_wait;
-	struct list_head write_pages;
-	struct list_head complete_pages;
-	mempool_t *write_pool;
-};
-
-/* the bitmap API */
-
-/* these are used only by md/bitmap */
-int  bitmap_create(mddev_t *mddev);
-void bitmap_destroy(mddev_t *mddev);
-int  bitmap_active(struct bitmap *bitmap);
-
-char *file_path(struct file *file, char *buf, int count);
-void bitmap_print_sb(struct bitmap *bitmap);
-int bitmap_update_sb(struct bitmap *bitmap);
-
-int  bitmap_setallbits(struct bitmap *bitmap);
-
-/* these are exported */
-void bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sectors);
-void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long sectors,
-		     int success);
-int bitmap_start_sync(struct bitmap *bitmap, sector_t offset, int *blocks);
-void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, int *blocks, int aborted);
-void bitmap_close_sync(struct bitmap *bitmap);
-
-int bitmap_unplug(struct bitmap *bitmap);
-#endif
-
 #endif
-- 
2.41.0