get rid of historic (unnecessary) code

[unix-history] / usr / src / sys / kern / vfs_bio.c

diff --git a/usr/src/sys/kern/vfs_bio.c b/usr/src/sys/kern/vfs_bio.c
index 205724a..400637c 100644 (file)
--- a/usr/src/sys/kern/vfs_bio.c
+++ b/usr/src/sys/kern/vfs_bio.c
@@ -14,7 +14,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *

- *     @(#)vfs_bio.c   7.28 (Berkeley) %G%
+ *     @(#)vfs_bio.c   7.29 (Berkeley) %G%

  */
 
 #include "param.h"
  */
 
 #include "param.h"


@@ -347,20 +347,6 @@ getblk(vp, blkno, size)
 
        if (size > MAXBSIZE)
                panic("getblk: size too big");
 
        if (size > MAXBSIZE)
                panic("getblk: size too big");

-       /*
-        * To prevent overflow of 32-bit ints when converting block
-        * numbers to byte offsets, blknos > 2^32 / DEV_BSIZE are set
-        * to the maximum number that can be converted to a byte offset
-        * without overflow. This is historic code; what bug it fixed,
-        * or whether it is still a reasonable thing to do is open to
-        * dispute. mkm 9/85
-        *
-        * Make it a panic to see if it ever really happens. mkm 11/89
-        */
-       if ((unsigned)blkno >= 1 << (sizeof(int)*NBBY-DEV_BSHIFT)) {
-               panic("getblk: blkno too big");
-               blkno = 1 << ((sizeof(int)*NBBY-DEV_BSHIFT) + 1);
-       }

        /*
         * Search the cache for the block.  If we hit, but
         * the buffer is in use for i/o, then we wait until
        /*
         * Search the cache for the block.  If we hit, but
         * the buffer is in use for i/o, then we wait until