The patch titled
bootmem: free/reserve helpers
has been removed from the -mm tree. Its filename was
bootmem-free-reserve-helpers.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: bootmem: free/reserve helpers
From: Johannes Weiner <hannes@xxxxxxxxxxxx>
Factor out the common operation of marking a range on the bitmap.
[akpm@xxxxxxxxxxxxxxxxxxxx: fix various warnings]
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Yinghai Lu <yhlu.kernel@xxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/bootmem.c | 65 ++++++++++++++++++++++++++++++++-----------------
1 file changed, 43 insertions(+), 22 deletions(-)
diff -puN mm/bootmem.c~bootmem-free-reserve-helpers mm/bootmem.c
--- a/mm/bootmem.c~bootmem-free-reserve-helpers
+++ a/mm/bootmem.c
@@ -225,6 +225,44 @@ unsigned long __init free_all_bootmem(vo
return free_all_bootmem_core(NODE_DATA(0)->bdata);
}
+static void __init __free(bootmem_data_t *bdata,
+ unsigned long sidx, unsigned long eidx)
+{
+ unsigned long idx;
+
+ bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data,
+ sidx + PFN_DOWN(bdata->node_boot_start),
+ eidx + PFN_DOWN(bdata->node_boot_start));
+
+ for (idx = sidx; idx < eidx; idx++)
+ if (!test_and_clear_bit(idx, bdata->node_bootmem_map))
+ BUG();
+}
+
+static int __init __reserve(bootmem_data_t *bdata, unsigned long sidx,
+ unsigned long eidx, int flags)
+{
+ unsigned long idx;
+ int exclusive = flags & BOOTMEM_EXCLUSIVE;
+
+ bdebug("nid=%td start=%lx end=%lx flags=%x\n",
+ bdata - bootmem_node_data,
+ sidx + PFN_DOWN(bdata->node_boot_start),
+ eidx + PFN_DOWN(bdata->node_boot_start),
+ flags);
+
+ for (idx = sidx; idx < eidx; idx++)
+ if (test_and_set_bit(idx, bdata->node_bootmem_map)) {
+ if (exclusive) {
+ __free(bdata, sidx, idx);
+ return -EBUSY;
+ }
+ bdebug("silent double reserve of PFN %lx\n",
+ idx + PFN_DOWN(bdata->node_boot_start));
+ }
+ return 0;
+}
+
static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
unsigned long size)
{
@@ -258,14 +296,7 @@ static void __init free_bootmem_core(boo
if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
- bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data,
- sidx + PFN_DOWN(bdata->node_boot_start),
- eidx + PFN_DOWN(bdata->node_boot_start));
-
- for (i = sidx; i < eidx; i++) {
- if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
- BUG();
- }
+ __free(bdata, sidx, eidx);
}
/**
@@ -367,16 +398,7 @@ static void __init reserve_bootmem_core(
if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
- bdebug("nid=%td start=%lx end=%lx flags=%x\n",
- bdata - bootmem_node_data,
- sidx + PFN_DOWN(bdata->node_boot_start),
- eidx + PFN_DOWN(bdata->node_boot_start),
- flags);
-
- for (i = sidx; i < eidx; i++)
- if (test_and_set_bit(i, bdata->node_bootmem_map))
- bdebug("hm, page %lx reserved twice.\n",
- PFN_DOWN(bdata->node_boot_start) + i);
+ return __reserve(bdata, sidx, eidx, flags);
}
/**
@@ -511,10 +533,9 @@ find_block:
/*
* Reserve the area now:
*/
- for (i = PFN_DOWN(start_off) + merge;
- i < PFN_UP(end_off); i++)
- if (test_and_set_bit(i, bdata->node_bootmem_map))
- BUG();
+ if (__reserve(bdata, PFN_DOWN(start_off) + merge,
+ PFN_UP(end_off), BOOTMEM_EXCLUSIVE))
+ BUG();
region = phys_to_virt(bdata->node_boot_start + start_off);
memset(region, 0, size);
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxxx are
origin.patch
linux-next.patch
git-xtensa.patch
documentation-update-codingstyle-tips-for-emacs-users-v2.patch
mm-more-likely-reclaim-madv_sequential-mappings.patch
mm-print-swapcache-page-count-in-show_swap_cache_info.patch
lib-generic-show_mem.patch
alpha-use-generic-show_mem.patch
avr32-use-generic-show_mem.patch
blackfin-use-generic-show_mem.patch
xtensa-use-generic-show_mem.patch
x86-use-generic-show_mem.patch
um-use-generic-show_mem.patch
sparc64-use-generic-show_mem.patch
sh-use-generic-show_mem.patch
s390-use-generic-show_mem.patch
powerpc-use-generic-show_mem.patch
mn10300-use-generic-show_mem.patch
h8300-use-generic-show_mem.patch
mips-use-generic-show_mem.patch
m68knommu-use-generic-show_mem.patch
m68k-use-generic-show_mem.patch
m32r-use-generic-show_mem.patch
frv-use-generic-show_mem.patch
cris-use-generic-show_mem.patch
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