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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2010-02-21 17:57:32 +0100 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2010-02-24 20:36:55 +0100 |
| commit | ecb1cf9c446ad7e8248160fe6797cd9bed817f24 (patch) | |
| tree | b31a52f938f7eee08f26455c2602bb8aca94bd9e /drivers/firewire | |
| parent | 6498ba04aee69540f8f586438f90d58e5b8e6936 (diff) | |
| download | kernel_samsung_tuna-ecb1cf9c446ad7e8248160fe6797cd9bed817f24.zip kernel_samsung_tuna-ecb1cf9c446ad7e8248160fe6797cd9bed817f24.tar.gz kernel_samsung_tuna-ecb1cf9c446ad7e8248160fe6797cd9bed817f24.tar.bz2 | |
firewire: ohci: reorder struct fw_ohci for better cache efficiency
The config_rom struct members are only accessed during relatively
infrequent self-ID-complete interrupts and only if the local config ROM
was changed, while the ar_, at_, ir_, it_ members are used very
frequently during I/O. Hence move the config_rom members further down.
More importantly, make the huge self_id_buffer member the last one; this
is only accessed in self-ID-complete interrupts.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
| -rw-r--r-- | drivers/firewire/ohci.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index 047331e..39ddb62 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -166,9 +166,6 @@ struct fw_ohci { struct fw_card card; __iomem char *registers; - dma_addr_t self_id_bus; - __le32 *self_id_cpu; - struct tasklet_struct bus_reset_tasklet; int node_id; int generation; int request_generation; /* for timestamping incoming requests */ @@ -182,14 +179,6 @@ struct fw_ohci { * this driver with this lock held. */ spinlock_t lock; - u32 self_id_buffer[512]; - - /* Config rom buffers */ - __be32 *config_rom; - dma_addr_t config_rom_bus; - __be32 *next_config_rom; - dma_addr_t next_config_rom_bus; - __be32 next_header; struct ar_context ar_request_ctx; struct ar_context ar_response_ctx; @@ -201,6 +190,18 @@ struct fw_ohci { u64 ir_context_channels; u32 ir_context_mask; struct iso_context *ir_context_list; + + __be32 *config_rom; + dma_addr_t config_rom_bus; + __be32 *next_config_rom; + dma_addr_t next_config_rom_bus; + __be32 next_header; + + __le32 *self_id_cpu; + dma_addr_t self_id_bus; + struct tasklet_struct bus_reset_tasklet; + + u32 self_id_buffer[512]; }; static inline struct fw_ohci *fw_ohci(struct fw_card *card) |