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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-10 15:13:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-10 15:13:06 +0200 |
| commit | 523aa3586ffb1fc11a9bf88f77ebaf71a15eb998 (patch) | |
| tree | 1fe96f54e8f1e667798a49ae4b3f951feb136ae0 /arch/powerpc/kernel/align.c | |
| parent | fd0f50db2eb72555ef8f70af14c1e3ee2079b32c (diff) | |
| parent | 39da7c509acff13fc8cb12ec1bb20337c988ed36 (diff) | |
Merge 4.11-rc6 into driver-core-next
We want the fixes in here as well for testing.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc/kernel/align.c')
| -rw-r--r-- | arch/powerpc/kernel/align.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c index cbc7c42cdb74..ec7a8b099dd9 100644 --- a/arch/powerpc/kernel/align.c +++ b/arch/powerpc/kernel/align.c @@ -807,14 +807,25 @@ int fix_alignment(struct pt_regs *regs) nb = aligninfo[instr].len; flags = aligninfo[instr].flags; - /* ldbrx/stdbrx overlap lfs/stfs in the DSISR unfortunately */ - if (IS_XFORM(instruction) && ((instruction >> 1) & 0x3ff) == 532) { - nb = 8; - flags = LD+SW; - } else if (IS_XFORM(instruction) && - ((instruction >> 1) & 0x3ff) == 660) { - nb = 8; - flags = ST+SW; + /* + * Handle some cases which give overlaps in the DSISR values. + */ + if (IS_XFORM(instruction)) { + switch (get_xop(instruction)) { + case 532: /* ldbrx */ + nb = 8; + flags = LD+SW; + break; + case 660: /* stdbrx */ + nb = 8; + flags = ST+SW; + break; + case 20: /* lwarx */ + case 84: /* ldarx */ + case 116: /* lharx */ + case 276: /* lqarx */ + return 0; /* not emulated ever */ + } } /* Byteswap little endian loads and stores */ |