diff options
| author | Bernhard Walle <[email protected]> | 2008-02-07 00:15:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2008-02-07 08:42:25 -0800 |
| commit | 72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 (patch) | |
| tree | c19f7d0b530577359840e959cce204939caf0649 /arch/powerpc/mm/mem.c | |
| parent | 25fad945a7f7ff2cf06e437381c6a1121784dbd9 (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().
[[email protected]: coding-style fixes]
[[email protected]: fix powerpc build]
Signed-off-by: Bernhard Walle <[email protected]>
Cc: <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Vivek Goyal <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'arch/powerpc/mm/mem.c')
| -rw-r--r-- | arch/powerpc/mm/mem.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index e8122447f019..ff5debf5eedd 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -220,12 +220,13 @@ void __init do_init_bootmem(void) lmb_size_bytes(&lmb.reserved, i) - 1; if (addr < total_lowmem) reserve_bootmem(lmb.reserved.region[i].base, - lmb_size_bytes(&lmb.reserved, i)); + lmb_size_bytes(&lmb.reserved, i), + BOOTMEM_DEFAULT); else if (lmb.reserved.region[i].base < total_lowmem) { unsigned long adjusted_size = total_lowmem - lmb.reserved.region[i].base; reserve_bootmem(lmb.reserved.region[i].base, - adjusted_size); + adjusted_size, BOOTMEM_DEFAULT); } } #else @@ -234,7 +235,8 @@ void __init do_init_bootmem(void) /* reserve the sections we're already using */ for (i = 0; i < lmb.reserved.cnt; i++) reserve_bootmem(lmb.reserved.region[i].base, - lmb_size_bytes(&lmb.reserved, i)); + lmb_size_bytes(&lmb.reserved, i), + BOOTMEM_DEFAULT); #endif /* XXX need to clip this if using highmem? */ |