Messages in this thread | | | Date | Sat, 03 Aug 2002 19:09:25 -0400 | From | Brian Gerst <> | Subject | Re: [PATCH] Dead code in i386/kernel/process.c |
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Brian Gerst wrote: > This patch removes an artifact of code left over from the 2.0 days when > the kernel didn't use flat segments. > > > ------------------------------------------------------------------------ > > diff -urN linux-2.5.30/arch/i386/kernel/process.c linux/arch/i386/kernel/process.c > --- linux-2.5.30/arch/i386/kernel/process.c Fri Aug 2 10:15:28 2002 > +++ linux/arch/i386/kernel/process.c Sat Aug 3 16:41:03 2002 > @@ -313,11 +313,6 @@ > memcpy (swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS, > sizeof (swapper_pg_dir [0]) * KERNEL_PGD_PTRS); > > - /* Make sure the first page is mapped to the start of physical memory. > - It is normally not mapped, to trap kernel NULL pointer dereferences. */ > - > - pg0[0] = _PAGE_RW | _PAGE_PRESENT; > - > /* > * Use `swapper_pg_dir' as our page directory. > */
I should clarify that the dead code does the same thing as the preceding memcpy.
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