diff options
| author | Bernhard Walle <[email protected]> | 2008-02-07 00:15:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2008-02-07 08:42:25 -0800 |
| commit | 72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 (patch) | |
| tree | c19f7d0b530577359840e959cce204939caf0649 /arch/sparc | |
| parent | 25fad945a7f7ff2cf06e437381c6a1121784dbd9 (diff) | |
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().
[[email protected]: coding-style fixes]
[[email protected]: fix powerpc build]
Signed-off-by: Bernhard Walle <[email protected]>
Cc: <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Vivek Goyal <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/mm/init.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/sparc/mm/init.c b/arch/sparc/mm/init.c index a1bef07755a9..b89837accc88 100644 --- a/arch/sparc/mm/init.c +++ b/arch/sparc/mm/init.c @@ -259,7 +259,7 @@ unsigned long __init bootmem_init(unsigned long *pages_avail) if (initrd_start) { /* Reserve the initrd image area. */ size = initrd_end - initrd_start; - reserve_bootmem(initrd_start, size); + reserve_bootmem(initrd_start, size, BOOTMEM_DEFAULT); *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; initrd_start = (initrd_start - phys_base) + PAGE_OFFSET; @@ -268,7 +268,7 @@ unsigned long __init bootmem_init(unsigned long *pages_avail) #endif /* Reserve the kernel text/data/bss. */ size = (start_pfn << PAGE_SHIFT) - phys_base; - reserve_bootmem(phys_base, size); + reserve_bootmem(phys_base, size, BOOTMEM_DEFAULT); *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; /* Reserve the bootmem map. We do not account for it @@ -276,7 +276,7 @@ unsigned long __init bootmem_init(unsigned long *pages_avail) * in free_all_bootmem. */ size = bootmap_size; - reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size); + reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size, BOOTMEM_DEFAULT); *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; return max_pfn; |