diff options
| author | Anton Blanchard <anton@samba.org> | 2013-08-07 02:01:51 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-08-14 15:33:40 +1000 |
| commit | 54bb7f4bda0ee49f39dc593c2d73fe6053a99dbb (patch) | |
| tree | 80a86974e8e89de50ec9eaacf3366a2f44c82986 /arch/powerpc/include/asm/paca.h | |
| parent | 8bd0b119ae64bf448e5f45d208007950e0ac2754 (diff) | |
powerpc: Make rwlocks endian safe
Our ppc64 spinlocks and rwlocks use a trick where a lock token and
the paca index are placed in the lock with a single store. Since we
are using two u16s they need adjusting for little endian.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/paca.h')
| -rw-r--r-- | arch/powerpc/include/asm/paca.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index 17d40a2a00c4..a5954cebbc55 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -68,8 +68,13 @@ struct paca_struct { * instruction. They must travel together and be properly * aligned. */ +#ifdef __BIG_ENDIAN__ u16 lock_token; /* Constant 0x8000, used in locks */ u16 paca_index; /* Logical processor number */ +#else + u16 paca_index; /* Logical processor number */ + u16 lock_token; /* Constant 0x8000, used in locks */ +#endif u64 kernel_toc; /* Kernel TOC address */ u64 kernelbase; /* Base address of kernel */ |