diff options
| author | Kevin Hilman <khilman@linaro.org> | 2015-07-22 08:17:15 -0700 |
|---|---|---|
| committer | Kevin Hilman <khilman@linaro.org> | 2015-07-22 08:17:15 -0700 |
| commit | 2447e09699cca5db52f86182f163f3a25d1089ab (patch) | |
| tree | e16730dba489e5ea0f16737597525724daa5c770 /include/linux/types.h | |
| parent | 5a277b6839c4ef6c6ccacff49b64f302598264bf (diff) | |
| parent | c8bde72f9af412de57f0ceae218d648640118b0b (diff) | |
Merge branch 'linux-4.1.y' of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable into linux-linaro-lsk-v4.1lsk-v4.1-15.07
* 'linux-4.1.y' of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable: (126 commits)
Linux 4.1.3
Input: pixcir_i2c_ts - fix receive error
of/pci: Fix pci_address_to_pio() conversion of CPU address to I/O port
PCI: pciehp: Wait for hotplug command completion where necessary
PCI: Add pci_bus_addr_t
PCI: Propagate the "ignore hotplug" setting to parent
mtd: dc21285: use raw spinlock functions for nw_gpio_lock
mtd: fix: avoid race condition when accessing mtd->usecount
leds / PM: fix hibernation on arm when gpio-led used with CPU led trigger
video: mxsfb: Make sure axi clock is enabled when accessing registers
genirq: devres: Fix testing return value of request_any_context_irq()
IB/srp: Fix reconnection failure handling
IB/srp: Fix connection state tracking
IB/srp: Fix a connection setup race
IB/srp: Remove an extraneous scsi_host_put() from an error path
scsi_transport_srp: Fix a race condition
scsi_transport_srp: Introduce srp_wait_for_queuecommand()
spi: pl022: Specify 'num-cs' property as required in devicetree binding
spi: orion: Fix maximum baud rates for Armada 370/XP
spi: fix race freeing dummy_tx/rx before it is unmapped
...
Diffstat (limited to 'include/linux/types.h')
| -rw-r--r-- | include/linux/types.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/types.h b/include/linux/types.h index 59698be03490..8715287c3b1f 100644 --- a/include/linux/types.h +++ b/include/linux/types.h @@ -139,12 +139,20 @@ typedef unsigned long blkcnt_t; */ #define pgoff_t unsigned long -/* A dma_addr_t can hold any valid DMA or bus address for the platform */ +/* + * A dma_addr_t can hold any valid DMA address, i.e., any address returned + * by the DMA API. + * + * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32 + * bits wide. Bus addresses, e.g., PCI BARs, may be wider than 32 bits, + * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses, + * so they don't care about the size of the actual bus addresses. + */ #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT typedef u64 dma_addr_t; #else typedef u32 dma_addr_t; -#endif /* dma_addr_t */ +#endif typedef unsigned __bitwise__ gfp_t; typedef unsigned __bitwise__ fmode_t; |