linux/arch/x86/mm
Bernhard Walle 72a7fe3967 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>
2008-02-07 08:42:25 -08:00
..
discontig_32.c Introduce flags for reserve_bootmem() 2008-02-07 08:42:25 -08:00
extable.c x86: unify extable_{32|64}.c 2008-01-30 13:31:41 +01:00
fault.c x86: fix deadlock, make pgd_lock irq-safe 2008-02-06 22:39:45 +01:00
highmem_32.c x86: kmap_atomic() debugging 2008-01-30 13:30:47 +01:00
hugetlbpage.c x86: demacro asm-x86/pgalloc_32.h 2008-01-30 13:33:39 +01:00
init_32.c x86: use _ASM_EXTABLE macro in arch/x86/mm/init_32.c 2008-02-04 16:47:58 +01:00
init_64.c Introduce flags for reserve_bootmem() 2008-02-07 08:42:25 -08:00
ioremap.c x86: no CPA on iounmap 2008-02-04 16:48:05 +01:00
k8topology_64.c x86: add PCI IDs to k8topology_64.c 2008-01-30 13:34:12 +01:00
Makefile x86_64: move mm 2007-10-11 11:17:18 +02:00
Makefile_32 x86: unify fault_32|64.c 2008-01-30 13:34:11 +01:00
Makefile_64 x86: unify fault_32|64.c 2008-01-30 13:34:11 +01:00
mmap.c x86: unify mmap_{32|64}.c 2008-01-30 13:31:10 +01:00
numa_64.c Introduce flags for reserve_bootmem() 2008-02-07 08:42:25 -08:00
pageattr-test.c x86: delay CPA self-test and repeat it 2008-02-06 22:39:45 +01:00
pageattr.c x86: remove suprious ifdefs from pageattr.c 2008-02-06 22:39:45 +01:00
pgtable_32.c add mm argument to pte/pmd/pud/pgd_free 2008-02-05 09:44:18 -08:00
srat_64.c Introduce flags for reserve_bootmem() 2008-02-07 08:42:25 -08:00