diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-09-11 01:31:45 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-14 17:24:25 +0200 |
| commit | 600715dcdf567c86f8b2c6173fcfb4b873e25a19 (patch) | |
| tree | c2f3ed1c928d3cc47af0573b56c8da2f1df880a0 /mm/Kconfig | |
| parent | 9dfed08eb4086584205717894177a9ee930c88c4 (diff) | |
| download | lwn-600715dcdf567c86f8b2c6173fcfb4b873e25a19.tar.gz lwn-600715dcdf567c86f8b2c6173fcfb4b873e25a19.zip | |
generic: add phys_addr_t for holding physical addresses
Add a kernel-wide "phys_addr_t" which is guaranteed to be able to hold
any physical address. By default it equals the word size of the
architecture, but a 32-bit architecture can set ARCH_PHYS_ADDR_T_64BIT
if it needs a 64-bit phys_addr_t.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 0bd9c2dbb2a0..91ee3922510a 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -187,6 +187,9 @@ config RESOURCES_64BIT help This option allows memory and IO resources to be 64 bit. +config PHYS_ADDR_T_64BIT + def_bool 64BIT || ARCH_PHYS_ADDR_T_64BIT + config ZONE_DMA_FLAG int default "0" if !ZONE_DMA |