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Kernel v2.6.24 /mm/filemap.h

Filename:/mm/filemap.h
Lines Added:0
Lines Deleted:103
Also changed in: (Previous) 2.6.24-rc8  2.6.24-rc7  2.6.24-rc6  2.6.24-rc5  2.6.24-rc4  2.6.24-rc3 
(Following)

Location
[  2.6.24
  [  mm
     o  filemap.h

Patch

diff --git a/mm/filemap.h b/mm/filemap.h
deleted file mode 100644
index c2bff04..0000000
--- a/mm/filemap.h
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- *   linux/mm/filemap.h
- *
- * Copyright (C) 1994-1999  Linus Torvalds
- */
-
-#ifndef __FILEMAP_H
-#define __FILEMAP_H
-
-#include <linux/types.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/highmem.h>
-#include <linux/uio.h>
-#include <linux/uaccess.h>
-
-size_t
-__filemap_copy_from_user_iovec_inatomic(char *vaddr,
-               const struct iovec *iov,
-               size_t base,
-               size_t bytes);
-
-/*
- * Copy as much as we can into the page and return the number of bytes which
- * were sucessfully copied.  If a fault is encountered then clear the page
- * out to (offset+bytes) and return the number of bytes which were copied.
- *
- * NOTE: For this to work reliably we really want copy_from_user_inatomic_nocache
- * to *NOT* zero any tail of the buffer that it failed to copy.  If it does,
- * and if the following non-atomic copy succeeds, then there is a small window
- * where the target page contains neither the data before the write, nor the
- * data after the write (it contains zero).  A read at this time will see
- * data that is inconsistent with any ordering of the read and the write.
- * (This has been detected in practice).
- */
-static inline size_t
-filemap_copy_from_user(struct page *page, unsigned long offset,
-         const char __user *buf, unsigned bytes)
-{
-   char *kaddr;
-   int left;
-
-   kaddr = kmap_atomic(page, KM_USER0);
-   left = __copy_from_user_inatomic_nocache(kaddr + offset, buf, bytes);
-   kunmap_atomic(kaddr, KM_USER0);
-
-   if (left != 0) {
-      /* Do it the slow way */
-      kaddr = kmap(page);
-      left = __copy_from_user_nocache(kaddr + offset, buf, bytes);
-      kunmap(page);
-   }
-   return bytes - left;
-}
-
-/*
- * This has the same sideeffects and return value as filemap_copy_from_user().
- * The difference is that on a fault we need to memset the remainder of the
- * page (out to offset+bytes), to emulate filemap_copy_from_user()'s
- * single-segment behaviour.
- */
-static inline size_t
-filemap_copy_from_user_iovec(struct page *page, unsigned long offset,
-         const struct iovec *iov, size_t base, size_t bytes)
-{
-   char *kaddr;
-   size_t copied;
-
-   kaddr = kmap_atomic(page, KM_USER0);
-   copied = __filemap_copy_from_user_iovec_inatomic(kaddr + offset, iov,
-                      base, bytes);
-   kunmap_atomic(kaddr, KM_USER0);
-   if (copied != bytes) {
-      kaddr = kmap(page);
-      copied = __filemap_copy_from_user_iovec_inatomic(kaddr + offset, iov,
-                         base, bytes);
-      if (bytes - copied)
-         memset(kaddr + offset + copied, 0, bytes - copied);
-      kunmap(page);
-   }
-   return copied;
-}
-
-static inline void
-filemap_set_next_iovec(const struct iovec **iovp, size_t *basep, size_t bytes)
-{
-   const struct iovec *iov = *iovp;
-   size_t base = *basep;
-
-   do {
-      int copy = min(bytes, iov->iov_len - base);
-
-      bytes -= copy;
-      base += copy;
-      if (iov->iov_len == base) {
-         iov++;
-         base = 0;
-      }
-   } while (bytes);
-   *iovp = iov;
-   *basep = base;
-}
-#endif


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