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authorBernhard Walle <bwalle@suse.de>2008-02-07 00:15:17 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:25 -0800
commit72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 (patch)
treec19f7d0b530577359840e959cce204939caf0649 /arch/sparc/mm
parent25fad945a7f7ff2cf06e437381c6a1121784dbd9 (diff)
downloadop-kernel-dev-72a7fe3967dbf86cb34e24fbf1d957fe24d2f246.zip
op-kernel-dev-72a7fe3967dbf86cb34e24fbf1d957fe24d2f246.tar.gz
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/sparc/mm')
-rw-r--r--arch/sparc/mm/init.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/sparc/mm/init.c b/arch/sparc/mm/init.c
index a1bef07..b89837a 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;
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