Re: [patch 3/3] x86_64: Make the x86_32 percpu operations usable on x86_64

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The following fix is needed for UP (did not have time to do proper 
testing, some people will get mad at me if I do not get into a vacation 
mode now, be back on the 13th of December):

Fix UP setup

The __per_cpu_start offset is still needed in a UP configuration. There we 
do not relocate the percpu area. So we must subtract __per_cpu_start in
setup64.c. It will be zero if the percpu area is relocated.

Signed-off-by: Christoph Lameter <[email protected]>

---
 arch/x86/kernel/setup64.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.24-rc3-mm2/arch/x86/kernel/setup64.c
===================================================================
--- linux-2.6.24-rc3-mm2.orig/arch/x86/kernel/setup64.c	2007-11-30 11:41:23.989455039 -0800
+++ linux-2.6.24-rc3-mm2/arch/x86/kernel/setup64.c	2007-11-30 11:41:47.497905579 -0800
@@ -115,7 +115,7 @@ void __init setup_per_cpu_areas(void)
 		/* Relocate the pda */
 		memcpy(ptr, cpu_pda(i), sizeof(struct x8664_pda));
 		cpu_pda(i) = (struct x8664_pda *)ptr;
-		cpu_pda(i)->data_offset = (unsigned long)ptr;
+		cpu_pda(i)->data_offset = ptr - __per_cpu_start;
 	}
 	/* Fix up pda for this processor .... */
 	pda_init(0);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux