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| author | Takashi Iwai <tiwai@suse.de> | 2008-12-20 22:42:55 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-12-20 22:42:55 (GMT) |
| commit | 6a8436419d1b77b24d82bd90354adc4baa393566 (patch) | |
| tree | d20e17b148f37dc299658a60303e6a2e4e6ce63f /arch/powerpc/kernel/entry_64.S | |
| parent | 55fa518867978e1f5fd8353098f80d125ac734d7 (diff) | |
| parent | ff75427a7f641c4468610fbda2ccb69218174cd1 (diff) | |
| download | linux-fsl-qoriq-6a8436419d1b77b24d82bd90354adc4baa393566.tar.xz | |
Merge branch 'topic/ca0106-capture-no-44khz' into topic/ca0106
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index e6d5284..e0bcf93 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -57,12 +57,18 @@ system_call_common: beq- 1f ld r1,PACAKSAVE(r13) 1: std r10,0(r1) - crclr so std r11,_NIP(r1) std r12,_MSR(r1) std r0,GPR0(r1) std r10,GPR1(r1) ACCOUNT_CPU_USER_ENTRY(r10, r11) + /* + * This "crclr so" clears CR0.SO, which is the error indication on + * return from this system call. There must be no cmp instruction + * between it and the "mfcr r9" below, otherwise if XER.SO is set, + * CR0.SO will get set, causing all system calls to appear to fail. + */ + crclr so std r2,GPR2(r1) std r3,GPR3(r1) std r4,GPR4(r1) |