Re: 2.6.12-rc3-mm2: ppc pte_offset_map()

[Jesper Juhl]

On Sun, 1 May 2005, Andrew Morton wrote:

> Jesper Juhl <juhl-lkml@xxxxxx> wrote:
> >
> > On Sun, 1 May 2005, Sean Neakums wrote:
> > 
> > > On my Mackertosh (PowerBook5.4), build fails with the following:
> > > 
> > >   fs/proc/task_mmu.c: In function `smaps_pte_range':
> > >   fs/proc/task_mmu.c:177: warning: implicit declaration of function `kmap_atomic'
> > >   fs/proc/task_mmu.c:177: error: `KM_PTE0' undeclared (first use in this function)
> > >   fs/proc/task_mmu.c:177: error: (Each undeclared identifier is reported only once
> > >   fs/proc/task_mmu.c:177: error: for each function it appears in.)
> > >   fs/proc/task_mmu.c:207: warning: implicit declaration of function `kunmap_atomic'
> > > 
> > > With the naive patch below, it builds with this warning and everything works.
> > > 
> > >   fs/proc/task_mmu.c: In function `smaps_pte_range':
> > >   fs/proc/task_mmu.c:208: warning: passing arg 1 of `kunmap_atomic' makes pointer from integer without a cast
> > > 
> > 
> > Try this patch :
> > 
> > Signed-off-by: Jesper Juhl <juhl-lkml@xxxxxx>
> > 
> > --- linux-2.6.12-rc3-mm2-orig/fs/proc/task_mmu.c	2005-05-01 04:04:25.000000000 +0200
> > +++ linux-2.6.12-rc3-mm2/fs/proc/task_mmu.c	2005-05-01 17:49:14.000000000 +0200
> > @@ -2,6 +2,7 @@
> >  #include <linux/hugetlb.h>
> >  #include <linux/mount.h>
> >  #include <linux/seq_file.h>
> > +#include <linux/highmem.h>
> >  
> >  #include <asm/elf.h>
> >  #include <asm/uaccess.h>
> > @@ -204,7 +205,7 @@ static void smaps_pte_range(pmd_t *pmd,
> >  			}
> >  		}
> >  	} while (address < end);
> > -	pte_unmap(pte);
> > +	pte_unmap((void *)pte);
> >  }
> 
> Should be
> 
> 	pte_unmap(ptep);
> 
Of course, stupid me. I should have seen the 
	[...]
        ptep = pte_offset_map(pmd, address);
	[...]
            pte = *ptep;
            address += PAGE_SIZE;
            ptep++;
	[...]
bit a few lines above. Guess I should have spend more than 2min creating 
the patch.

Thanks.

Here's an updated patch.

Signed-off-by: Jesper Juhl <juhl-lkml@xxxxxx>

--- linux-2.6.12-rc3-mm2-orig/fs/proc/task_mmu.c	2005-05-01 04:04:25.000000000 +0200
+++ linux-2.6.12-rc3-mm2/fs/proc/task_mmu.c	2005-05-02 00:59:11.000000000 +0200
@@ -2,6 +2,7 @@
 #include <linux/hugetlb.h>
 #include <linux/mount.h>
 #include <linux/seq_file.h>
+#include <linux/highmem.h>
 
 #include <asm/elf.h>
 #include <asm/uaccess.h>
@@ -204,7 +205,7 @@ static void smaps_pte_range(pmd_t *pmd,
 			}
 		}
 	} while (address < end);
-	pte_unmap(pte);
+	pte_unmap(ptep);
 }
 
 static void smaps_pmd_range(pud_t *pud,


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