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| author | Bernhard Walle <bwalle@suse.de> | 2008-02-07 09:15:17 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 17:42:25 +0100 |
| commit | 72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 (patch) | |
| tree | c19f7d0b530577359840e959cce204939caf0649 /arch/v850/kernel/rte_ma1_cb.c | |
| parent | fs menu: small reorg (diff) | |
| download | linux-72a7fe3967dbf86cb34e24fbf1d957fe24d2f246.tar.xz linux-72a7fe3967dbf86cb34e24fbf1d957fe24d2f246.zip | |
Introduce flags for reserve_bootmem()
This patchset adds a flags variable to reserve_bootmem() and uses the
BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions
between crashkernel area and already used memory.
This patch:
Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE.
If that flag is set, the function returns with -EBUSY if the memory already
has been reserved in the past. This is to avoid conflicts.
Because that code runs before SMP initialisation, there's no race condition
inside reserve_bootmem_core().
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix powerpc build]
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: <linux-arch@vger.kernel.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/v850/kernel/rte_ma1_cb.c')
| -rw-r--r-- | arch/v850/kernel/rte_ma1_cb.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/v850/kernel/rte_ma1_cb.c b/arch/v850/kernel/rte_ma1_cb.c index 9a716f946421..08abf3d5f8df 100644 --- a/arch/v850/kernel/rte_ma1_cb.c +++ b/arch/v850/kernel/rte_ma1_cb.c @@ -46,13 +46,15 @@ void __init mach_reserve_bootmem () { #ifdef CONFIG_RTE_CB_MULTI /* Prevent the kernel from touching the monitor's scratch RAM. */ - reserve_bootmem (MON_SCRATCH_ADDR, MON_SCRATCH_SIZE); + reserve_bootmem(MON_SCRATCH_ADDR, MON_SCRATCH_SIZE, + BOOTMEM_DEFAULT); #endif /* The space between SRAM and SDRAM is filled with duplicate images of SRAM. Prevent the kernel from using them. */ reserve_bootmem (SRAM_ADDR + SRAM_SIZE, - SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE)); + SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE), + BOOTMEM_DEFAULT); } void mach_gettimeofday (struct timespec *tv) |