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| author |   Sergey Shtylyov <s.shtylyov@omp.ru> | 2022-06-14 22:51:47 +0300 |
|---|---|---|
| committer |   Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-06-17 16:35:02 +0900 |
| commit | f0a6d77b351c18c122fc1638ac9e58f5e0346f64 (patch) | |
| tree | 1e232bf4b52162f14bd05ab62b6c2651d03ce4bc /kernel/debug/ssh:/git@git.zx2c4.com | |
| parent | ata: libata-core: get rid of *else* branches in ata_id_n_sectors() (diff) | |
| download | linux-dev-f0a6d77b351c18c122fc1638ac9e58f5e0346f64.tar.xz linux-dev-f0a6d77b351c18c122fc1638ac9e58f5e0346f64.zip | |
ata: make transfer mode masks *unsigned int*
The packed transfer mode masks and also the {pio|mwdma|udma}_mask fields
of *struct*s ata_device and ata_port_info are declared as *unsigned long*
(which is a 64-bit type on 64-bit architectures) but actually the packed
masks occupy only 20 bits (7 PIO modes, 5 MWDMA modes, and 8 UDMA modes)
and the PIO/MWDMA/UDMA masks easily fit into just 8 bits each, so we can
safely use (always 32-bit) *unsigned int* variables instead. This saves
745 bytes of object code in libata-core.o alone, not to mention LLDDs...
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Diffstat (limited to 'kernel/debug/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions