This patch does _only_ some cleanup in the bootmem allocator by:
- following the kernel coding style conventions
- using pfn/page conversion macros
- removing some not needed parentheses
- removing some useless included headers
- limiting to 80 column width
It also removes __init tags in the header file and hopefully make it
easier to read.
Signed-off-by: Franck Bui-Huu <[email protected]>
---
include/linux/bootmem.h | 101 ++++++++++++++----------
mm/bootmem.c | 195 ++++++++++++++++++++++++++---------------------
2 files changed, 167 insertions(+), 129 deletions(-)
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index da2d107..dd733ee 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -41,45 +41,64 @@ typedef struct bootmem_data {
struct list_head list;
} bootmem_data_t;
-extern unsigned long __init bootmem_bootmap_pages (unsigned long);
-extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
-extern void __init free_bootmem (unsigned long addr, unsigned long size);
-extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
-extern void * __init __alloc_bootmem_nopanic (unsigned long size, unsigned long align, unsigned long goal);
-extern void * __init __alloc_bootmem_low(unsigned long size,
- unsigned long align,
- unsigned long goal);
-extern void * __init __alloc_bootmem_low_node(pg_data_t *pgdat,
- unsigned long size,
- unsigned long align,
- unsigned long goal);
-extern void * __init __alloc_bootmem_core(struct bootmem_data *bdata,
- unsigned long size, unsigned long align, unsigned long goal,
- unsigned long limit);
+extern unsigned long bootmem_bootmap_pages(unsigned long);
+extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
+extern void free_bootmem(unsigned long addr, unsigned long size);
+extern void * __alloc_bootmem(unsigned long size,
+ unsigned long align,
+ unsigned long goal);
+extern void * __alloc_bootmem_nopanic(unsigned long size,
+ unsigned long align,
+ unsigned long goal);
+extern void * __alloc_bootmem_low(unsigned long size,
+ unsigned long align,
+ unsigned long goal);
+extern void * __alloc_bootmem_low_node(pg_data_t *pgdat,
+ unsigned long size,
+ unsigned long align,
+ unsigned long goal);
+extern void * __alloc_bootmem_core(struct bootmem_data *bdata,
+ unsigned long size,
+ unsigned long align,
+ unsigned long goal,
+ unsigned long limit);
+
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
-extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
+extern void reserve_bootmem(unsigned long addr, unsigned long size);
#define alloc_bootmem(x) \
- __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
+ __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low(x) \
- __alloc_bootmem_low((x), SMP_CACHE_BYTES, 0)
+ __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
#define alloc_bootmem_pages(x) \
- __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
+ __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages(x) \
- __alloc_bootmem_low((x), PAGE_SIZE, 0)
+ __alloc_bootmem_low(x, PAGE_SIZE, 0)
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
-extern unsigned long __init free_all_bootmem (void);
-extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
-extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
-extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
-extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
-extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
+
+extern unsigned long free_all_bootmem(void);
+extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
+extern void * __alloc_bootmem_node(pg_data_t *pgdat,
+ unsigned long size,
+ unsigned long align,
+ unsigned long goal);
+extern unsigned long init_bootmem_node(pg_data_t *pgdat,
+ unsigned long freepfn,
+ unsigned long startpfn,
+ unsigned long endpfn);
+extern void reserve_bootmem_node(pg_data_t *pgdat,
+ unsigned long physaddr,
+ unsigned long size);
+extern void free_bootmem_node(pg_data_t *pgdat,
+ unsigned long addr,
+ unsigned long size);
+
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
#define alloc_bootmem_node(pgdat, x) \
- __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
+ __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_pages_node(pgdat, x) \
- __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
+ __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages_node(pgdat, x) \
- __alloc_bootmem_low_node((pgdat), (x), PAGE_SIZE, 0)
+ __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
@@ -89,19 +108,19 @@ static inline void *alloc_remap(int nid,
{
return NULL;
}
-#endif
+#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
-extern unsigned long __initdata nr_kernel_pages;
-extern unsigned long __initdata nr_all_pages;
+extern unsigned long nr_kernel_pages;
+extern unsigned long nr_all_pages;
-extern void *__init alloc_large_system_hash(const char *tablename,
- unsigned long bucketsize,
- unsigned long numentries,
- int scale,
- int flags,
- unsigned int *_hash_shift,
- unsigned int *_hash_mask,
- unsigned long limit);
+extern void *alloc_large_system_hash(const char *tablename,
+ unsigned long bucketsize,
+ unsigned long numentries,
+ int scale,
+ int flags,
+ unsigned int *_hash_shift,
+ unsigned int *_hash_mask,
+ unsigned long limit);
#define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
#define HASH_EARLY 0x00000002 /* Allocating during early boot? */
@@ -114,7 +133,7 @@ #define HASHDIST_DEFAULT 1
#else
#define HASHDIST_DEFAULT 0
#endif
-extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
+extern int hashdist; /* Distribute hashes across NUMA nodes? */
#endif /* _LINUX_BOOTMEM_H */
diff --git a/mm/bootmem.c b/mm/bootmem.c
index d213fed..a8fb272 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -8,17 +8,14 @@
* free memory collector. It's used to deal with reserved
* system memory and memory holes as well.
*/
-
-#include <linux/mm.h>
-#include <linux/kernel_stat.h>
-#include <linux/swap.h>
-#include <linux/interrupt.h>
#include <linux/init.h>
-#include <linux/bootmem.h>
#include <linux/mmzone.h>
+#include <linux/bootmem.h>
+#include <linux/pfn.h>
#include <linux/module.h>
-#include <asm/dma.h>
+
#include <asm/io.h>
+
#include "internal.h"
/*
@@ -43,7 +40,7 @@ unsigned long saved_max_pfn;
#endif
/* return the number of _pages_ that will be allocated for the boot bitmap */
-unsigned long __init bootmem_bootmap_pages (unsigned long pages)
+unsigned long __init bootmem_bootmap_pages(unsigned long pages)
{
unsigned long mapsize;
@@ -56,7 +53,7 @@ unsigned long __init bootmem_bootmap_pag
/*
* link bdata in order
*/
-static void link_bootmem(bootmem_data_t *bdata)
+static void __init link_bootmem(bootmem_data_t *bdata)
{
bootmem_data_t *ent;
if (list_empty(&bdata_list)) {
@@ -71,22 +68,32 @@ static void link_bootmem(bootmem_data_t
}
}
list_add_tail(&bdata->list, &bdata_list);
- return;
}
+/*
+ * Given an initialised bdata, it returns the size of the boot bitmap
+ */
+static unsigned long __init get_mapsize(bootmem_data_t *bdata)
+{
+ unsigned long mapsize;
+ unsigned long start = PFN_DOWN(bdata->node_boot_start);
+ unsigned long end = bdata->node_low_pfn;
+
+ mapsize = ((end - start) + 7) / 8;
+ return ALIGN(mapsize, sizeof(long));
+}
/*
* Called once to set up the allocator itself.
*/
-static unsigned long __init init_bootmem_core (pg_data_t *pgdat,
+static unsigned long __init init_bootmem_core(pg_data_t *pgdat,
unsigned long mapstart, unsigned long start, unsigned long end)
{
bootmem_data_t *bdata = pgdat->bdata;
- unsigned long mapsize = ((end - start)+7)/8;
+ unsigned long mapsize;
- mapsize = ALIGN(mapsize, sizeof(long));
- bdata->node_bootmem_map = phys_to_virt(mapstart << PAGE_SHIFT);
- bdata->node_boot_start = (start << PAGE_SHIFT);
+ bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart));
+ bdata->node_boot_start = PFN_PHYS(start);
bdata->node_low_pfn = end;
link_bootmem(bdata);
@@ -94,6 +101,7 @@ static unsigned long __init init_bootmem
* Initially all pages are reserved - setup_arch() has to
* register free RAM areas explicitly.
*/
+ mapsize = get_mapsize(bdata);
memset(bdata->node_bootmem_map, 0xff, mapsize);
return mapsize;
@@ -104,22 +112,22 @@ static unsigned long __init init_bootmem
* might be used for boot-time allocations - or it might get added
* to the free page pool later on.
*/
-static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long addr, unsigned long size)
+static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
+ unsigned long size)
{
+ unsigned long sidx, eidx;
unsigned long i;
+
/*
* round up, partially reserved pages are considered
* fully reserved.
*/
- unsigned long sidx = (addr - bdata->node_boot_start)/PAGE_SIZE;
- unsigned long eidx = (addr + size - bdata->node_boot_start +
- PAGE_SIZE-1)/PAGE_SIZE;
- unsigned long end = (addr + size + PAGE_SIZE-1)/PAGE_SIZE;
-
BUG_ON(!size);
- BUG_ON(sidx >= eidx);
- BUG_ON((addr >> PAGE_SHIFT) >= bdata->node_low_pfn);
- BUG_ON(end > bdata->node_low_pfn);
+ BUG_ON(PFN_DOWN(addr) >= bdata->node_low_pfn);
+ BUG_ON(PFN_UP(addr + size) > bdata->node_low_pfn);
+
+ sidx = PFN_DOWN(addr - bdata->node_boot_start);
+ eidx = PFN_UP(addr + size - bdata->node_boot_start);
for (i = sidx; i < eidx; i++)
if (test_and_set_bit(i, bdata->node_bootmem_map)) {
@@ -129,20 +137,18 @@ #endif
}
}
-static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, unsigned long size)
+static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
+ unsigned long size)
{
+ unsigned long sidx, eidx;
unsigned long i;
- unsigned long start;
+
/*
* round down end of usable mem, partially free pages are
* considered reserved.
*/
- unsigned long sidx;
- unsigned long eidx = (addr + size - bdata->node_boot_start)/PAGE_SIZE;
- unsigned long end = (addr + size)/PAGE_SIZE;
-
BUG_ON(!size);
- BUG_ON(end > bdata->node_low_pfn);
+ BUG_ON(PFN_DOWN(addr + size) > bdata->node_low_pfn);
if (addr < bdata->last_success)
bdata->last_success = addr;
@@ -150,8 +156,8 @@ static void __init free_bootmem_core(boo
/*
* Round up the beginning of the address.
*/
- start = (addr + PAGE_SIZE-1) / PAGE_SIZE;
- sidx = start - (bdata->node_boot_start/PAGE_SIZE);
+ sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
+ eidx = PFN_DOWN(addr + size - bdata->node_boot_start);
for (i = sidx; i < eidx; i++) {
if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
@@ -176,11 +182,13 @@ void * __init
__alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size,
unsigned long align, unsigned long goal, unsigned long limit)
{
- unsigned long offset, remaining_size, areasize, preferred;
- unsigned long i, start = 0, incr, eidx, end_pfn = bdata->node_low_pfn;
+ unsigned long offset, areasize, preferred;
+ unsigned long i, start, incr, eidx;
+ unsigned long end_pfn;
+ unsigned long remaining_size;
void *ret;
- if(!size) {
+ if (!size) {
printk("__alloc_bootmem_core(): zero-sized request\n");
BUG();
}
@@ -189,23 +197,22 @@ __alloc_bootmem_core(struct bootmem_data
if (limit && bdata->node_boot_start >= limit)
return NULL;
- limit >>=PAGE_SHIFT;
+ end_pfn = bdata->node_low_pfn;
+ limit = PFN_DOWN(limit);
if (limit && end_pfn > limit)
end_pfn = limit;
- eidx = end_pfn - (bdata->node_boot_start >> PAGE_SHIFT);
+ eidx = end_pfn - PFN_DOWN(bdata->node_boot_start);
offset = 0;
- if (align &&
- (bdata->node_boot_start & (align - 1UL)) != 0)
- offset = (align - (bdata->node_boot_start & (align - 1UL)));
- offset >>= PAGE_SHIFT;
+ if (align && (bdata->node_boot_start & (align - 1UL)) != 0)
+ offset = align - (bdata->node_boot_start & (align - 1UL));
+ offset = PFN_DOWN(offset);
/*
* We try to allocate bootmem pages above 'goal'
* first, then we try to allocate lower pages.
*/
- if (goal && (goal >= bdata->node_boot_start) &&
- ((goal >> PAGE_SHIFT) < end_pfn)) {
+ if (goal && goal >= bdata->node_boot_start && PFN_DOWN(goal) < end_pfn) {
preferred = goal - bdata->node_boot_start;
if (bdata->last_success >= preferred)
@@ -214,11 +221,11 @@ __alloc_bootmem_core(struct bootmem_data
} else
preferred = 0;
- preferred = ALIGN(preferred, align) >> PAGE_SHIFT;
- preferred += offset;
- areasize = (size+PAGE_SIZE-1)/PAGE_SIZE;
+ preferred = PFN_DOWN(ALIGN(preferred, align)) + offset;
+ areasize = (size + PAGE_SIZE-1) / PAGE_SIZE;
incr = align >> PAGE_SHIFT ? : 1;
+ start = 0;
restart_scan:
for (i = preferred; i < eidx; i += incr) {
unsigned long j;
@@ -231,7 +238,7 @@ restart_scan:
for (j = i + 1; j < i + areasize; ++j) {
if (j >= eidx)
goto fail_block;
- if (test_bit (j, bdata->node_bootmem_map))
+ if (test_bit(j, bdata->node_bootmem_map))
goto fail_block;
}
start = i;
@@ -247,7 +254,7 @@ restart_scan:
return NULL;
found:
- bdata->last_success = start << PAGE_SHIFT;
+ bdata->last_success = PFN_PHYS(start);
BUG_ON(start >= eidx);
/*
@@ -259,19 +266,21 @@ found:
bdata->last_offset && bdata->last_pos+1 == start) {
offset = ALIGN(bdata->last_offset, align);
BUG_ON(offset > PAGE_SIZE);
- remaining_size = PAGE_SIZE-offset;
+ remaining_size = PAGE_SIZE - offset;
if (size < remaining_size) {
areasize = 0;
/* last_pos unchanged */
- bdata->last_offset = offset+size;
- ret = phys_to_virt(bdata->last_pos*PAGE_SIZE + offset +
- bdata->node_boot_start);
+ bdata->last_offset = offset + size;
+ ret = phys_to_virt(bdata->last_pos * PAGE_SIZE +
+ offset +
+ bdata->node_boot_start);
} else {
remaining_size = size - remaining_size;
- areasize = (remaining_size+PAGE_SIZE-1)/PAGE_SIZE;
- ret = phys_to_virt(bdata->last_pos*PAGE_SIZE + offset +
- bdata->node_boot_start);
- bdata->last_pos = start+areasize-1;
+ areasize = (remaining_size + PAGE_SIZE-1) / PAGE_SIZE;
+ ret = phys_to_virt(bdata->last_pos * PAGE_SIZE +
+ offset +
+ bdata->node_boot_start);
+ bdata->last_pos = start + areasize - 1;
bdata->last_offset = remaining_size;
}
bdata->last_offset &= ~PAGE_MASK;
@@ -284,7 +293,7 @@ found:
/*
* Reserve the area now:
*/
- for (i = start; i < start+areasize; i++)
+ for (i = start; i < start + areasize; i++)
if (unlikely(test_and_set_bit(i, bdata->node_bootmem_map)))
BUG();
memset(ret, 0, size);
@@ -305,8 +314,8 @@ static unsigned long __init free_all_boo
count = 0;
/* first extant page of the node */
- pfn = bdata->node_boot_start >> PAGE_SHIFT;
- idx = bdata->node_low_pfn - (bdata->node_boot_start >> PAGE_SHIFT);
+ pfn = PFN_DOWN(bdata->node_boot_start);
+ idx = bdata->node_low_pfn - pfn;
map = bdata->node_bootmem_map;
/* Check physaddr is O(LOG2(BITS_PER_LONG)) page aligned */
if (bdata->node_boot_start == 0 ||
@@ -335,7 +344,7 @@ static unsigned long __init free_all_boo
}
}
} else {
- i+=BITS_PER_LONG;
+ i += BITS_PER_LONG;
}
pfn += BITS_PER_LONG;
}
@@ -347,9 +356,10 @@ static unsigned long __init free_all_boo
*/
page = virt_to_page(bdata->node_bootmem_map);
count = 0;
- for (i = 0; i < ((bdata->node_low_pfn-(bdata->node_boot_start >> PAGE_SHIFT))/8 + PAGE_SIZE-1)/PAGE_SIZE; i++,page++) {
- count++;
+ idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT;
+ for (i = 0; i < idx; i++, page++) {
__free_pages_bootmem(page, 0);
+ count++;
}
total += count;
bdata->node_bootmem_map = NULL;
@@ -357,64 +367,72 @@ static unsigned long __init free_all_boo
return total;
}
-unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn)
+unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
+ unsigned long startpfn, unsigned long endpfn)
{
- return(init_bootmem_core(pgdat, freepfn, startpfn, endpfn));
+ return init_bootmem_core(pgdat, freepfn, startpfn, endpfn);
}
-void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size)
+void __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
+ unsigned long size)
{
reserve_bootmem_core(pgdat->bdata, physaddr, size);
}
-void __init free_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size)
+void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
+ unsigned long size)
{
free_bootmem_core(pgdat->bdata, physaddr, size);
}
-unsigned long __init free_all_bootmem_node (pg_data_t *pgdat)
+unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
{
- return(free_all_bootmem_core(pgdat));
+ return free_all_bootmem_core(pgdat);
}
-unsigned long __init init_bootmem (unsigned long start, unsigned long pages)
+unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
{
max_low_pfn = pages;
min_low_pfn = start;
- return(init_bootmem_core(NODE_DATA(0), start, 0, pages));
+ return init_bootmem_core(NODE_DATA(0), start, 0, pages);
}
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
-void __init reserve_bootmem (unsigned long addr, unsigned long size)
+void __init reserve_bootmem(unsigned long addr, unsigned long size)
{
reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size);
}
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
-void __init free_bootmem (unsigned long addr, unsigned long size)
+void __init free_bootmem(unsigned long addr, unsigned long size)
{
free_bootmem_core(NODE_DATA(0)->bdata, addr, size);
}
-unsigned long __init free_all_bootmem (void)
+unsigned long __init free_all_bootmem(void)
{
- return(free_all_bootmem_core(NODE_DATA(0)));
+ return free_all_bootmem_core(NODE_DATA(0));
}
-void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, unsigned long goal)
+void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
+ unsigned long goal)
{
bootmem_data_t *bdata;
void *ptr;
- list_for_each_entry(bdata, &bdata_list, list)
- if ((ptr = __alloc_bootmem_core(bdata, size, align, goal, 0)))
- return(ptr);
+ list_for_each_entry(bdata, &bdata_list, list) {
+ ptr = __alloc_bootmem_core(bdata, size, align, goal, 0);
+ if (ptr)
+ return ptr;
+ }
return NULL;
}
-void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal)
+void * __init __alloc_bootmem(unsigned long size, unsigned long align,
+ unsigned long goal)
{
void *mem = __alloc_bootmem_nopanic(size,align,goal);
+
if (mem)
return mem;
/*
@@ -426,8 +444,8 @@ void * __init __alloc_bootmem(unsigned l
}
-void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, unsigned long align,
- unsigned long goal)
+void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
+ unsigned long align, unsigned long goal)
{
void *ptr;
@@ -440,16 +458,17 @@ void * __init __alloc_bootmem_node(pg_da
#define LOW32LIMIT 0xffffffff
-void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, unsigned long goal)
+void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
+ unsigned long goal)
{
bootmem_data_t *bdata;
void *ptr;
- list_for_each_entry(bdata, &bdata_list, list)
- if ((ptr = __alloc_bootmem_core(bdata, size,
- align, goal, LOW32LIMIT)))
- return(ptr);
-
+ list_for_each_entry(bdata, &bdata_list, list) {
+ ptr = __alloc_bootmem_core(bdata, size, align, goal, LOW32LIMIT);
+ if (ptr)
+ return ptr;
+ }
/*
* Whoops, we cannot satisfy the allocation request.
*/
--
1.4.0.g64e8
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