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authorBernhard Walle <bwalle@suse.de>2008-02-07 03:15:17 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 11:42:25 -0500
commit72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 (patch)
treec19f7d0b530577359840e959cce204939caf0649 /arch/blackfin
parent25fad945a7f7ff2cf06e437381c6a1121784dbd9 (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(). [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/blackfin')
-rw-r--r--arch/blackfin/kernel/setup.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 462cae893757..6e106b3d7729 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -406,7 +406,7 @@ void __init setup_arch(char **cmdline_p)
406 */ 406 */
407 free_bootmem(memory_start, memory_end - memory_start); 407 free_bootmem(memory_start, memory_end - memory_start);
408 408
409 reserve_bootmem(memory_start, bootmap_size); 409 reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
410 /* 410 /*
411 * get kmalloc into gear 411 * get kmalloc into gear
412 */ 412 */