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/avr32/kernel/setup.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'arch/avr32') diff --git a/arch/avr32/kernel/setup.c b/arch/avr32/kernel/setup.c index 4b4c1884e1c..e66a07a928c 100644 --- a/arch/avr32/kernel/setup.c +++ b/arch/avr32/kernel/setup.c @@ -489,7 +489,8 @@ static void __init setup_bootmem(void) /* Reserve space for the bootmem bitmap... */ reserve_bootmem_node(NODE_DATA(node), PFN_PHYS(bootmap_pfn), - bootmap_size); + bootmap_size, + BOOTMEM_DEFAULT); /* ...and any other reserved regions. */ for (res = reserved; res; res = res->sibling) { @@ -505,7 +506,8 @@ static void __init setup_bootmem(void) && res->end < PFN_PHYS(max_pfn)) reserve_bootmem_node( NODE_DATA(node), res->start, - res->end - res->start + 1); + res->end - res->start + 1, + BOOTMEM_DEFAULT); } node_set_online(node); -- cgit v1.2.3