mm: section numbers use the type "unsigned long"
Patch series "mm: Further memory block device cleanups", v1.
Some further cleanups around memory block devices. Especially, clean up
and simplify walk_memory_range(). Including some other minor cleanups.
This patch (of 6):
We are using a mixture of "int" and "unsigned long". Let's make this
consistent by using "unsigned long" everywhere. We'll do the same with
memory block ids next.
While at it, turn the "unsigned long i" in removable_show() into an int
- sections_per_block is an int.
[akpm@linux-foundation.org: s/unsigned long i/unsigned long nr/]
[david@redhat.com: v3]
Link: http://lkml.kernel.org/r/20190620183139.4352-2-david@redhat.com
Link: http://lkml.kernel.org/r/20190614100114.311-2-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Arun KS <arunks@codeaurora.org>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 826dd76..5947b5a 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -34,7 +34,7 @@
static int sections_per_block;
-static inline int base_memory_block_id(int section_nr)
+static inline int base_memory_block_id(unsigned long section_nr)
{
return section_nr / sections_per_block;
}
@@ -131,9 +131,9 @@
static ssize_t removable_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- unsigned long i, pfn;
- int ret = 1;
struct memory_block *mem = to_memory_block(dev);
+ unsigned long pfn;
+ int ret = 1, i;
if (mem->state != MEM_ONLINE)
goto out;
@@ -691,15 +691,15 @@
return ret;
}
-static int add_memory_block(int base_section_nr)
+static int add_memory_block(unsigned long base_section_nr)
{
+ int ret, section_count = 0;
struct memory_block *mem;
- int i, ret, section_count = 0;
+ unsigned long nr;
- for (i = base_section_nr;
- i < base_section_nr + sections_per_block;
- i++)
- if (present_section_nr(i))
+ for (nr = base_section_nr; nr < base_section_nr + sections_per_block;
+ nr++)
+ if (present_section_nr(nr))
section_count++;
if (section_count == 0)
@@ -822,10 +822,9 @@
*/
int __init memory_dev_init(void)
{
- unsigned int i;
int ret;
int err;
- unsigned long block_sz;
+ unsigned long block_sz, nr;
ret = subsys_system_register(&memory_subsys, memory_root_attr_groups);
if (ret)
@@ -839,9 +838,9 @@
* during boot and have been initialized
*/
mutex_lock(&mem_sysfs_mutex);
- for (i = 0; i <= __highest_present_section_nr;
- i += sections_per_block) {
- err = add_memory_block(i);
+ for (nr = 0; nr <= __highest_present_section_nr;
+ nr += sections_per_block) {
+ err = add_memory_block(nr);
if (!ret)
ret = err;
}
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 70394ca..298d1c3 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1219,7 +1219,7 @@
return NULL;
return &mem_section[SECTION_NR_TO_ROOT(nr)][nr & SECTION_ROOT_MASK];
}
-extern int __section_nr(struct mem_section* ms);
+extern unsigned long __section_nr(struct mem_section *ms);
extern unsigned long usemap_size(void);
/*
@@ -1291,7 +1291,7 @@
return __nr_to_section(pfn_to_section_nr(pfn));
}
-extern int __highest_present_section_nr;
+extern unsigned long __highest_present_section_nr;
#ifndef CONFIG_HAVE_ARCH_PFN_VALID
static inline int pfn_valid(unsigned long pfn)
diff --git a/mm/sparse.c b/mm/sparse.c
index fe44b2d..b29534c 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -102,7 +102,7 @@
#endif
#ifdef CONFIG_SPARSEMEM_EXTREME
-int __section_nr(struct mem_section* ms)
+unsigned long __section_nr(struct mem_section *ms)
{
unsigned long root_nr;
struct mem_section *root = NULL;
@@ -121,9 +121,9 @@
return (root_nr * SECTIONS_PER_ROOT) + (ms - root);
}
#else
-int __section_nr(struct mem_section* ms)
+unsigned long __section_nr(struct mem_section *ms)
{
- return (int)(ms - mem_section[0]);
+ return (unsigned long)(ms - mem_section[0]);
}
#endif
@@ -178,10 +178,10 @@
* Keeping track of this gives us an easy way to break out of
* those loops early.
*/
-int __highest_present_section_nr;
+unsigned long __highest_present_section_nr;
static void section_mark_present(struct mem_section *ms)
{
- int section_nr = __section_nr(ms);
+ unsigned long section_nr = __section_nr(ms);
if (section_nr > __highest_present_section_nr)
__highest_present_section_nr = section_nr;
@@ -189,7 +189,7 @@
ms->section_mem_map |= SECTION_MARKED_PRESENT;
}
-static inline int next_present_section_nr(int section_nr)
+static inline unsigned long next_present_section_nr(unsigned long section_nr)
{
do {
section_nr++;
