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| author | David Daney <ddaney@caviumnetworks.com> | 2010-10-14 12:36:49 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2011-01-18 19:30:28 +0100 |
| commit | 1befdd5536e1500371f7f884d0f0ae528a519333 (patch) | |
| tree | 0c189a3c6686381f1393f9ea5cb161c36e08738f /arch/mips | |
| parent | f5b35d0b16a08e6c1e7c8a41fa87ad10cf9aefa4 (diff) | |
| download | linux-3.10-1befdd5536e1500371f7f884d0f0ae528a519333.tar.gz linux-3.10-1befdd5536e1500371f7f884d0f0ae528a519333.tar.bz2 linux-3.10-1befdd5536e1500371f7f884d0f0ae528a519333.zip | |
MIPS: Implement __read_mostly
Just do what everyone else is doing by placing __read_mostly things in
the .data.read_mostly section.
mips_io_port_base can not be read-only (const) and writable
(__read_mostly) at the same time. One of them has to go, so I chose
to eliminate the __read_mostly. It will still get stuck in a portion
of memory that is not adjacent to things that are written, and thus
not be on a dirty cache line, for whatever that is worth.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1702/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/cache.h | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/setup.c | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/arch/mips/include/asm/cache.h b/arch/mips/include/asm/cache.h index 37f175c42bb..650ac9ba734 100644 --- a/arch/mips/include/asm/cache.h +++ b/arch/mips/include/asm/cache.h @@ -17,4 +17,6 @@ #define SMP_CACHE_SHIFT L1_CACHE_SHIFT #define SMP_CACHE_BYTES L1_CACHE_BYTES +#define __read_mostly __attribute__((__section__(".data.read_mostly"))) + #endif /* _ASM_CACHE_H */ diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index acd3f2c49c0..8ad1d5679f1 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -70,7 +70,7 @@ static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; * mips_io_port_base is the begin of the address space to which x86 style * I/O ports are mapped. */ -const unsigned long mips_io_port_base __read_mostly = -1; +const unsigned long mips_io_port_base = -1; EXPORT_SYMBOL(mips_io_port_base); static struct resource code_resource = { .name = "Kernel code", }; |