diff options
author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2007-10-12 21:27:47 -0400 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2007-10-12 21:27:47 -0400 |
commit | b981d8b3f5e008ff10d993be633ad00564fc22cd (patch) | |
tree | e292dc07b22308912cf6a58354a608b9e5e8e1fd /arch/ppc/kernel/misc.S | |
parent | b11d2127c4893a7315d1e16273bc8560049fa3ca (diff) | |
parent | 2b9e0aae1d50e880c58d46788e5e3ebd89d75d62 (diff) |
Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
drivers/macintosh/adbhid.c
Diffstat (limited to 'arch/ppc/kernel/misc.S')
-rw-r--r-- | arch/ppc/kernel/misc.S | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/ppc/kernel/misc.S b/arch/ppc/kernel/misc.S index 0da55368655..a22e1f4d94c 100644 --- a/arch/ppc/kernel/misc.S +++ b/arch/ppc/kernel/misc.S @@ -237,9 +237,19 @@ _GLOBAL(_tlbie) mfspr r4,SPRN_MMUCR mfspr r5,SPRN_PID /* Get PID */ rlwimi r4,r5,0,24,31 /* Set TID */ - mtspr SPRN_MMUCR,r4 + /* We have to run the search with interrupts disabled, even critical + * and debug interrupts (in fact the only critical exceptions we have + * are debug and machine check). Otherwise an interrupt which causes + * a TLB miss can clobber the MMUCR between the mtspr and the tlbsx. */ + mfmsr r5 + lis r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@ha + addi r6,r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@l + andc r6,r5,r6 + mtmsr r6 + mtspr SPRN_MMUCR,r4 tlbsx. r3, 0, r3 + mtmsr r5 bne 10f sync /* There are only 64 TLB entries, so r3 < 64, |