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/alpha/kernel/core_irongate.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/alpha/kernel/core_irongate.c') diff --git a/arch/alpha/kernel/core_irongate.c b/arch/alpha/kernel/core_irongate.c index e4a0bcf1d28..a872078497b 100644 --- a/arch/alpha/kernel/core_irongate.c +++ b/arch/alpha/kernel/core_irongate.c @@ -241,7 +241,8 @@ albacore_init_arch(void) size / 1024); } #endif - reserve_bootmem_node(NODE_DATA(0), pci_mem, memtop - pci_mem); + reserve_bootmem_node(NODE_DATA(0), pci_mem, memtop - + pci_mem, BOOTMEM_DEFAULT); printk("irongate_init_arch: temporarily reserving " "region %08lx-%08lx for PCI\n", pci_mem, memtop - 1); } -- cgit v1.2.3