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| author | David S. Miller <davem@davemloft.net> | 2012-05-10 11:00:46 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-21 09:40:01 -0700 |
| commit | 1c1cb5756a8d296bbc33fc844f97048dc09ee172 (patch) | |
| tree | f2b9110ef1391ab7923c17a41c7b7024d98a8b40 | |
| parent | 6f6f21eceec3a60d2066bb3b5e31dc14f9168fa7 (diff) | |
| download | linux-stable-1c1cb5756a8d296bbc33fc844f97048dc09ee172.tar.gz linux-stable-1c1cb5756a8d296bbc33fc844f97048dc09ee172.tar.bz2 linux-stable-1c1cb5756a8d296bbc33fc844f97048dc09ee172.zip | |
sparc64: Do not clobber %g2 in xcall_fetch_glob_regs().
[ Upstream commit a5a737e090e25981e99d69f01400e3a80356581c ]
%g2 is meant to hold the CPUID number throughout this routine, since
at the very beginning, and at the very end, we use %g2 to calculate
indexes into per-cpu arrays.
However we erroneously clobber it in order to hold the %cwp register
value mid-stream.
Fix this code to use %g3 for the %cwp read and related calulcations
instead.
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/sparc/kernel/central.c | 2 | ||||
| -rw-r--r-- | arch/sparc/mm/ultra.S | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/sparc/kernel/central.c b/arch/sparc/kernel/central.c index 7eef3f741963..f5ddc0bae38d 100644 --- a/arch/sparc/kernel/central.c +++ b/arch/sparc/kernel/central.c @@ -268,4 +268,4 @@ static int __init sunfire_init(void) return 0; } -subsys_initcall(sunfire_init); +fs_initcall(sunfire_init); diff --git a/arch/sparc/mm/ultra.S b/arch/sparc/mm/ultra.S index b57a5942ba64..874162a11ceb 100644 --- a/arch/sparc/mm/ultra.S +++ b/arch/sparc/mm/ultra.S @@ -495,11 +495,11 @@ xcall_fetch_glob_regs: stx %o7, [%g1 + GR_SNAP_O7] stx %i7, [%g1 + GR_SNAP_I7] /* Don't try this at home kids... */ - rdpr %cwp, %g2 - sub %g2, 1, %g7 + rdpr %cwp, %g3 + sub %g3, 1, %g7 wrpr %g7, %cwp mov %i7, %g7 - wrpr %g2, %cwp + wrpr %g3, %cwp stx %g7, [%g1 + GR_SNAP_RPC] sethi %hi(trap_block), %g7 or %g7, %lo(trap_block), %g7 |