[TRIVIAL PATCH 2.5.50] madvise_willneed makes bad limit comparison

[Kingsley Cheung]

Hi,

Trivial patch against 2.5.50, similar to the patch I sent earlier for
2.4.20, to fix the bad rss limit comparision in 'madvise_willneed'.

diff -urN linux-2.5.50/mm/madvise.c linux-2.5.50patched/mm/madvise.c
--- linux-2.5.50/mm/madvise.c   Thu Nov 28 09:35:53 2002
+++ linux-2.5.50patched/mm/madvise.c    Mon Dec  9 15:20:48 2002
@@ -75,10 +75,12 @@
 
        /* Make sure this doesn't exceed the process's max rss. */
        error = -EIO;
-       rlim_rss = current->rlim ?  current->rlim[RLIMIT_RSS].rlim_cur :
-                               LONG_MAX; /* default: see resource.h */
-       if ((vma->vm_mm->rss + (end - start)) > rlim_rss)
-               return error;
+       rlim_rss = current->rlim[RLIMIT_RSS].rlim_cur;
+       if (rlim_rss != RLIM_INFINITY) {
+               rlim_rss >>= PAGE_SHIFT;
+               if ((vma->vm_mm->rss + (end - start)) > rlim_rss)
+                       return error;
+       }
 
        do_page_cache_readahead(file->f_dentry->d_inode->i_mapping, file, start, end - start);
        return 0;

-- 
		Kingsley