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| author | Bernhard Walle <bwalle@suse.de> | 2008-02-07 00:15:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:25 -0800 |
| commit | 72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 (patch) | |
| tree | c19f7d0b530577359840e959cce204939caf0649 /arch/sparc64/mm | |
| parent | 25fad945a7f7ff2cf06e437381c6a1121784dbd9 (diff) | |
| download | talos-op-linux-72a7fe3967dbf86cb34e24fbf1d957fe24d2f246.tar.gz talos-op-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/sparc64/mm')
| -rw-r--r-- | arch/sparc64/mm/init.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index 523e993ee90c..e726c45645ff 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -997,7 +997,7 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail, prom_printf("reserve_bootmem(initrd): base[%llx] size[%lx]\n", initrd_start, initrd_end); #endif - reserve_bootmem(initrd_start, size); + reserve_bootmem(initrd_start, size, BOOTMEM_DEFAULT); initrd_start += PAGE_OFFSET; initrd_end += PAGE_OFFSET; @@ -1007,7 +1007,7 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail, #ifdef CONFIG_DEBUG_BOOTMEM prom_printf("reserve_bootmem(kernel): base[%lx] size[%lx]\n", kern_base, kern_size); #endif - reserve_bootmem(kern_base, kern_size); + reserve_bootmem(kern_base, kern_size, BOOTMEM_DEFAULT); *pages_avail -= PAGE_ALIGN(kern_size) >> PAGE_SHIFT; /* Add back in the initmem pages. */ @@ -1024,7 +1024,7 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail, prom_printf("reserve_bootmem(bootmap): base[%lx] size[%lx]\n", (bootmap_pfn << PAGE_SHIFT), size); #endif - reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size); + reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size, BOOTMEM_DEFAULT); for (i = 0; i < pavail_ents; i++) { unsigned long start_pfn, end_pfn; @@ -1489,7 +1489,7 @@ static void __init taint_real_pages(void) goto do_next_page; } } - reserve_bootmem(old_start, PAGE_SIZE); + reserve_bootmem(old_start, PAGE_SIZE, BOOTMEM_DEFAULT); do_next_page: old_start += PAGE_SIZE; |
