diff options
| author | Hollis Blanchard <hollisb@us.ibm.com> | 2008-11-26 19:19:26 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-12-29 01:53:14 +0300 |
| commit | 6ca4f7494bde078b2b730e28e4ea1dc36a772f70 (patch) | |
| tree | 431b008ef1b85983e6ecd10e61e7ce145f8f31f7 /arch/powerpc/kernel/prom.c | |
| parent | f8f50b1bddd49eb171398cfc543c957884dc6e35 (diff) | |
| download | linux-6ca4f7494bde078b2b730e28e4ea1dc36a772f70.tar.xz | |
powerpc: Force memory size to be a multiple of PAGE_SIZE
Ensure that total memory size is page-aligned, because otherwise
mark_bootmem() gets upset.
This error case was triggered by using 64 KiB pages in the kernel
while arch/powerpc/boot/4xx.c arbitrarily reduced the amount of memory
by 4096 (to work around a chip bug that affects the last 256 bytes of
physical memory).
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/prom.c')
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index d8266dd61dda..6f73c739f1e2 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -1160,6 +1160,8 @@ static inline void __init phyp_dump_reserve_mem(void) {} void __init early_init_devtree(void *params) { + unsigned long limit; + DBG(" -> early_init_devtree(%p)\n", params); /* Setup flat device-tree pointer */ @@ -1200,7 +1202,19 @@ void __init early_init_devtree(void *params) early_reserve_mem(); phyp_dump_reserve_mem(); - lmb_enforce_memory_limit(memory_limit); + limit = memory_limit; + if (! limit) { + unsigned long memsize; + + /* Ensure that total memory size is page-aligned, because + * otherwise mark_bootmem() gets upset. */ + lmb_analyze(); + memsize = lmb_phys_mem_size(); + if ((memsize & PAGE_MASK) != memsize) + limit = memsize & PAGE_MASK; + } + lmb_enforce_memory_limit(limit); + lmb_analyze(); DBG("Phys. mem: %lx\n", lmb_phys_mem_size()); |