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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/m32r
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/m32r')
-rw-r--r--arch/m32r/kernel/setup.c11
-rw-r--r--arch/m32r/mm/discontig.c5
2 files changed, 10 insertions, 6 deletions
diff --git a/arch/m32r/kernel/setup.c b/arch/m32r/kernel/setup.c
index d64814385d7..f1f5db0c408 100644
--- a/arch/m32r/kernel/setup.c
+++ b/arch/m32r/kernel/setup.c
@@ -177,25 +177,28 @@ static unsigned long __init setup_memory(void)
*/
reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE,
(PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1)
- - CONFIG_MEMORY_START);
+ - CONFIG_MEMORY_START,
+ BOOTMEM_DEFAULT);
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
- reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE);
+ reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE, BOOTMEM_DEFAULT);
/*
* reserve memory hole
*/
#ifdef CONFIG_MEMHOLE
- reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE);
+ reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE,
+ BOOTMEM_DEFAULT);
#endif
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
- reserve_bootmem(INITRD_START, INITRD_SIZE);
+ reserve_bootmem(INITRD_START, INITRD_SIZE,
+ BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET;
initrd_end = initrd_start + INITRD_SIZE;
printk("initrd:start[%08lx],size[%08lx]\n",
diff --git a/arch/m32r/mm/discontig.c b/arch/m32r/mm/discontig.c
index c7efdb0aefc..07c1af7dc0e 100644
--- a/arch/m32r/mm/discontig.c
+++ b/arch/m32r/mm/discontig.c
@@ -91,7 +91,8 @@ unsigned long __init setup_memory(void)
PFN_PHYS(mp->pages));
reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
- PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size);
+ PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size,
+ BOOTMEM_DEFAULT);
if (max_low_pfn < max_pfn)
max_low_pfn = max_pfn;
@@ -104,7 +105,7 @@ unsigned long __init setup_memory(void)
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
reserve_bootmem_node(NODE_DATA(0), INITRD_START,
- INITRD_SIZE);
+ INITRD_SIZE, BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET;
initrd_end = initrd_start + INITRD_SIZE;
printk("initrd:start[%08lx],size[%08lx]\n",