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authorJeremy Fitzhardinge <jeremy@goop.org>2008-09-11 01:31:45 -0700
committerIngo Molnar <mingo@elte.hu>2008-09-14 17:24:25 +0200
commit600715dcdf567c86f8b2c6173fcfb4b873e25a19 (patch)
treec2f3ed1c928d3cc47af0573b56c8da2f1df880a0 /mm/Kconfig
parent9dfed08eb4086584205717894177a9ee930c88c4 (diff)
downloadconfigs-600715dcdf567c86f8b2c6173fcfb4b873e25a19.tar.gz
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/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index 0bd9c2dbb2a..91ee3922510 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