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| author | Al Viro <viro@ftp.linux.org.uk> | 2007-12-16 23:30:08 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 15:07:09 -0800 |
| commit | f3ec33e587df02e25963755989cc473e3f07bf0d (patch) | |
| tree | 5f176f664af9b9b8ad76ca5fdfd8fd68de6a1fe5 /drivers/net/sunhme.h | |
| parent | b710b43c306650261c01ad08100791afec78a7db (diff) | |
| download | linux-f3ec33e587df02e25963755989cc473e3f07bf0d.tar.gz | |
sunhme endianness annotations
This one is interesting - SBUS and PCI variants have opposite endianness in descriptors (SBUS is sparc-only, so there host-endian == big-endian). Solution: declare a bitwise type (hme32) and in accessor helpers do typechecking and force-casts (once we know that the type is right). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/sunhme.h')
| -rw-r--r-- | drivers/net/sunhme.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/sunhme.h b/drivers/net/sunhme.h index 90f446db9ba2..4da5539fac7b 100644 --- a/drivers/net/sunhme.h +++ b/drivers/net/sunhme.h @@ -302,9 +302,11 @@ * Always write the address first before setting the ownership * bits to avoid races with the hardware scanning the ring. */ +typedef u32 __bitwise__ hme32; + struct happy_meal_rxd { - u32 rx_flags; - u32 rx_addr; + hme32 rx_flags; + hme32 rx_addr; }; #define RXFLAG_OWN 0x80000000 /* 1 = hardware, 0 = software */ @@ -313,8 +315,8 @@ struct happy_meal_rxd { #define RXFLAG_CSUM 0x0000ffff /* HW computed checksum */ struct happy_meal_txd { - u32 tx_flags; - u32 tx_addr; + hme32 tx_flags; + hme32 tx_addr; }; #define TXFLAG_OWN 0x80000000 /* 1 = hardware, 0 = software */ @@ -400,7 +402,7 @@ struct happy_meal { struct hmeal_init_block *happy_block; /* RX and TX descriptors (CPU addr) */ #if defined(CONFIG_SBUS) && defined(CONFIG_PCI) - u32 (*read_desc32)(u32 *); + u32 (*read_desc32)(hme32 *); void (*write_txd)(struct happy_meal_txd *, u32, u32); void (*write_rxd)(struct happy_meal_rxd *, u32, u32); u32 (*dma_map)(void *, void *, long, int); |