diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/lmb.c | 56 |
1 files changed, 30 insertions, 26 deletions
diff --git a/lib/lmb.c b/lib/lmb.c index e4bbc617f46..896e2832099 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -230,20 +230,23 @@ static u64 lmb_align_up(u64 addr, u64 size) static u64 __init lmb_alloc_nid_unreserved(u64 start, u64 end, u64 size, u64 align) { - u64 base; + u64 base, res_base; long j; base = lmb_align_down((end - size), align); - while (start <= base && - ((j = lmb_overlaps_region(&lmb.reserved, base, size)) >= 0)) - base = lmb_align_down(lmb.reserved.region[j].base - size, - align); - - if (base != 0 && start <= base) { - if (lmb_add_region(&lmb.reserved, base, - lmb_align_up(size, align)) < 0) - base = ~(u64)0; - return base; + while (start <= base) { + j = lmb_overlaps_region(&lmb.reserved, base, size); + if (j < 0) { + /* this area isn't reserved, take it */ + if (lmb_add_region(&lmb.reserved, base, + lmb_align_up(size, align)) < 0) + base = ~(u64)0; + return base; + } + res_base = lmb.reserved.region[j].base; + if (res_base < size) + break; + base = lmb_align_down(res_base - size, align); } return ~(u64)0; @@ -315,10 +318,12 @@ u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr) { long i, j; u64 base = 0; + u64 res_base; BUG_ON(0 == size); /* On some platforms, make sure we allocate lowmem */ + /* Note that LMB_REAL_LIMIT may be LMB_ALLOC_ANYWHERE */ if (max_addr == LMB_ALLOC_ANYWHERE) max_addr = LMB_REAL_LIMIT; @@ -326,6 +331,8 @@ u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr) u64 lmbbase = lmb.memory.region[i].base; u64 lmbsize = lmb.memory.region[i].size; + if (lmbsize < size) + continue; if (max_addr == LMB_ALLOC_ANYWHERE) base = lmb_align_down(lmbbase + lmbsize - size, align); else if (lmbbase < max_addr) { @@ -334,25 +341,22 @@ u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr) } else continue; - while (lmbbase <= base) { + while (base && lmbbase <= base) { j = lmb_overlaps_region(&lmb.reserved, base, size); - if (j < 0) + if (j < 0) { + /* this area isn't reserved, take it */ + if (lmb_add_region(&lmb.reserved, base, + size) < 0) + return 0; + return base; + } + res_base = lmb.reserved.region[j].base; + if (res_base < size) break; - base = lmb_align_down(lmb.reserved.region[j].base - size, - align); + base = lmb_align_down(res_base - size, align); } - - if ((base != 0) && (lmbbase <= base)) - break; } - - if (i < 0) - return 0; - - if (lmb_add_region(&lmb.reserved, base, lmb_align_up(size, align)) < 0) - return 0; - - return base; + return 0; } /* You must call lmb_analyze() before this. */ |