From 72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 Mon Sep 17 00:00:00 2001 From: Bernhard Walle Date: Thu, 7 Feb 2008 00:15:17 -0800 Subject: 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 Cc: Cc: "Eric W. Biederman" Cc: Vivek Goyal Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m32r/mm/discontig.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/m32r/mm') 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", -- cgit v1.2.3-70-g09d2