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| author | Bernhard Walle <bwalle@suse.de> | 2008-02-07 09:15:17 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 17:42:25 +0100 |
| commit | 72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 (patch) | |
| tree | c19f7d0b530577359840e959cce204939caf0649 /arch/parisc/mm/init.c | |
| parent | fs menu: small reorg (diff) | |
| download | linux-72a7fe3967dbf86cb34e24fbf1d957fe24d2f246.tar.xz linux-72a7fe3967dbf86cb34e24fbf1d957fe24d2f246.zip | |
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/parisc/mm/init.c')
| -rw-r--r-- | arch/parisc/mm/init.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index aa875fa43488..eb80f5e33d7d 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -315,11 +315,13 @@ static void __init setup_bootmem(void) #define PDC_CONSOLE_IO_IODC_SIZE 32768 reserve_bootmem_node(NODE_DATA(0), 0UL, - (unsigned long)(PAGE0->mem_free + PDC_CONSOLE_IO_IODC_SIZE)); + (unsigned long)(PAGE0->mem_free + + PDC_CONSOLE_IO_IODC_SIZE), BOOTMEM_DEFAULT); reserve_bootmem_node(NODE_DATA(0), __pa((unsigned long)_text), - (unsigned long)(_end - _text)); + (unsigned long)(_end - _text), BOOTMEM_DEFAULT); reserve_bootmem_node(NODE_DATA(0), (bootmap_start_pfn << PAGE_SHIFT), - ((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT)); + ((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT), + BOOTMEM_DEFAULT); #ifndef CONFIG_DISCONTIGMEM @@ -328,7 +330,8 @@ static void __init setup_bootmem(void) for (i = 0; i < npmem_holes; i++) { reserve_bootmem_node(NODE_DATA(0), (pmem_holes[i].start_pfn << PAGE_SHIFT), - (pmem_holes[i].pages << PAGE_SHIFT)); + (pmem_holes[i].pages << PAGE_SHIFT), + BOOTMEM_DEFAULT); } #endif @@ -346,7 +349,8 @@ static void __init setup_bootmem(void) initrd_below_start_ok = 1; printk(KERN_INFO "initrd: reserving %08lx-%08lx (mem_max %08lx)\n", __pa(initrd_start), __pa(initrd_start) + initrd_reserve, mem_max); - reserve_bootmem_node(NODE_DATA(0),__pa(initrd_start), initrd_reserve); + reserve_bootmem_node(NODE_DATA(0), __pa(initrd_start), + initrd_reserve, BOOTMEM_DEFAULT); } } #endif |