[lkml]   [2000]   [Mar]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: kiobugs in 2.3.48

On Thu, 2 Mar 2000 11:53:19 +0530 (IST), V Ganesh <>

> we do
> map = follow_page(ptr);
> to convert the userspace vaddr to a struct page *. right ?


> where is it converted to a kernel virtual address ?

There is a one-to-one equivalence between kernel addresses and struct
page *s.

> then we do
> map = get_page_map(map, ptr);
> and now we pass this to get_page_map() which promptly returns 0,

Yikes. Yes, somebody snuck a completely bogus patch into 2.3.48. The
_only_ reason vaddr should be used in get_page_map() is to act as an
argument to ZERO_PAGE() for architectures in which the zero page is

This bug is not present in the patch I sent out last week. I'll submit
the fixes to Linus shortly.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:56    [W:0.019 / U:4.208 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site