The patch titled
Subject: mm: use proper type for cma_[alloc|release]
has been added to the -mm tree. Its filename is
mm-use-proper-type-for-cma_.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-use-proper-type-for-cma_.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-use-proper-type-for-cma_.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Minchan Kim <minchan@xxxxxxxxxx>
Subject: mm: use proper type for cma_[alloc|release]
size_t in cma_alloc is confusing since it makes people think it's byte
count, not pages. Change it to unsigned long[1].
The unsigned int in cma_release is also not right so change it. Since we
have unsigned long in cma_release, free_contig_range should also respect
it.
[1] 67a2e213e7e9, mm: cma: fix incorrect type conversion for size during dma allocation
Link: https://lore.kernel.org/linux-mm/20210324043434.GP1719932@xxxxxxxxxxxxxxxxxxxx/
Link: https://lkml.kernel.org/r/20210331164018.710560-1-minchan@xxxxxxxxxx
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/cma.h | 4 ++--
include/linux/gfp.h | 2 +-
include/trace/events/cma.h | 22 +++++++++++-----------
mm/cma.c | 17 +++++++++--------
mm/page_alloc.c | 6 +++---
5 files changed, 26 insertions(+), 25 deletions(-)
--- a/include/linux/cma.h~mm-use-proper-type-for-cma_
+++ a/include/linux/cma.h
@@ -44,9 +44,9 @@ extern int cma_init_reserved_mem(phys_ad
unsigned int order_per_bit,
const char *name,
struct cma **res_cma);
-extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
+extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align,
bool no_warn);
-extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
+extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count);
extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
#endif
--- a/include/linux/gfp.h~mm-use-proper-type-for-cma_
+++ a/include/linux/gfp.h
@@ -657,7 +657,7 @@ extern int alloc_contig_range(unsigned l
extern struct page *alloc_contig_pages(unsigned long nr_pages, gfp_t gfp_mask,
int nid, nodemask_t *nodemask);
#endif
-void free_contig_range(unsigned long pfn, unsigned int nr_pages);
+void free_contig_range(unsigned long pfn, unsigned long nr_pages);
#ifdef CONFIG_CMA
/* CMA stuff */
--- a/include/trace/events/cma.h~mm-use-proper-type-for-cma_
+++ a/include/trace/events/cma.h
@@ -11,7 +11,7 @@
DECLARE_EVENT_CLASS(cma_alloc_class,
TP_PROTO(const char *name, unsigned long pfn, const struct page *page,
- unsigned int count, unsigned int align),
+ unsigned long count, unsigned int align),
TP_ARGS(name, pfn, page, count, align),
@@ -19,7 +19,7 @@ DECLARE_EVENT_CLASS(cma_alloc_class,
__string(name, name)
__field(unsigned long, pfn)
__field(const struct page *, page)
- __field(unsigned int, count)
+ __field(unsigned long, count)
__field(unsigned int, align)
),
@@ -31,7 +31,7 @@ DECLARE_EVENT_CLASS(cma_alloc_class,
__entry->align = align;
),
- TP_printk("name=%s pfn=%lx page=%p count=%u align=%u",
+ TP_printk("name=%s pfn=%lx page=%p count=%lu align=%u",
__get_str(name),
__entry->pfn,
__entry->page,
@@ -42,7 +42,7 @@ DECLARE_EVENT_CLASS(cma_alloc_class,
TRACE_EVENT(cma_release,
TP_PROTO(const char *name, unsigned long pfn, const struct page *page,
- unsigned int count),
+ unsigned long count),
TP_ARGS(name, pfn, page, count),
@@ -50,7 +50,7 @@ TRACE_EVENT(cma_release,
__string(name, name)
__field(unsigned long, pfn)
__field(const struct page *, page)
- __field(unsigned int, count)
+ __field(unsigned long, count)
),
TP_fast_assign(
@@ -60,7 +60,7 @@ TRACE_EVENT(cma_release,
__entry->count = count;
),
- TP_printk("name=%s pfn=%lx page=%p count=%u",
+ TP_printk("name=%s pfn=%lx page=%p count=%lu",
__get_str(name),
__entry->pfn,
__entry->page,
@@ -69,13 +69,13 @@ TRACE_EVENT(cma_release,
TRACE_EVENT(cma_alloc_start,
- TP_PROTO(const char *name, unsigned int count, unsigned int align),
+ TP_PROTO(const char *name, unsigned long count, unsigned int align),
TP_ARGS(name, count, align),
TP_STRUCT__entry(
__string(name, name)
- __field(unsigned int, count)
+ __field(unsigned long, count)
__field(unsigned int, align)
),
@@ -85,7 +85,7 @@ TRACE_EVENT(cma_alloc_start,
__entry->align = align;
),
- TP_printk("name=%s count=%u align=%u",
+ TP_printk("name=%s count=%lu align=%u",
__get_str(name),
__entry->count,
__entry->align)
@@ -94,7 +94,7 @@ TRACE_EVENT(cma_alloc_start,
DEFINE_EVENT(cma_alloc_class, cma_alloc_finish,
TP_PROTO(const char *name, unsigned long pfn, const struct page *page,
- unsigned int count, unsigned int align),
+ unsigned long count, unsigned int align),
TP_ARGS(name, pfn, page, count, align)
);
@@ -102,7 +102,7 @@ DEFINE_EVENT(cma_alloc_class, cma_alloc_
DEFINE_EVENT(cma_alloc_class, cma_alloc_busy_retry,
TP_PROTO(const char *name, unsigned long pfn, const struct page *page,
- unsigned int count, unsigned int align),
+ unsigned long count, unsigned int align),
TP_ARGS(name, pfn, page, count, align)
);
--- a/mm/cma.c~mm-use-proper-type-for-cma_
+++ a/mm/cma.c
@@ -79,7 +79,7 @@ static unsigned long cma_bitmap_pages_to
}
static void cma_clear_bitmap(struct cma *cma, unsigned long pfn,
- unsigned int count)
+ unsigned long count)
{
unsigned long bitmap_no, bitmap_count;
unsigned long flags;
@@ -423,21 +423,21 @@ static inline void cma_debug_show_areas(
* This function allocates part of contiguous memory on specific
* contiguous memory area.
*/
-struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
- bool no_warn)
+struct page *cma_alloc(struct cma *cma, unsigned long count,
+ unsigned int align, bool no_warn)
{
unsigned long mask, offset;
unsigned long pfn = -1;
unsigned long start = 0;
unsigned long bitmap_maxno, bitmap_no, bitmap_count;
- size_t i;
+ unsigned long i;
struct page *page = NULL;
int ret = -ENOMEM;
if (!cma || !cma->count || !cma->bitmap)
goto out;
- pr_debug("%s(cma %p, count %zu, align %d)\n", __func__, (void *)cma,
+ pr_debug("%s(cma %p, count %lu, align %d)\n", __func__, (void *)cma,
count, align);
if (!count)
@@ -505,7 +505,7 @@ struct page *cma_alloc(struct cma *cma,
}
if (ret && !no_warn) {
- pr_err_ratelimited("%s: %s: alloc failed, req-size: %zu pages, ret: %d\n",
+ pr_err_ratelimited("%s: %s: alloc failed, req-size: %lu pages, ret: %d\n",
__func__, cma->name, count, ret);
cma_debug_show_areas(cma);
}
@@ -534,14 +534,15 @@ out:
* It returns false when provided pages do not belong to contiguous area and
* true otherwise.
*/
-bool cma_release(struct cma *cma, const struct page *pages, unsigned int count)
+bool cma_release(struct cma *cma, const struct page *pages,
+ unsigned long count)
{
unsigned long pfn;
if (!cma || !pages)
return false;
- pr_debug("%s(page %p, count %u)\n", __func__, (void *)pages, count);
+ pr_debug("%s(page %p, count %lu)\n", __func__, (void *)pages, count);
pfn = page_to_pfn(pages);
--- a/mm/page_alloc.c~mm-use-proper-type-for-cma_
+++ a/mm/page_alloc.c
@@ -8973,9 +8973,9 @@ struct page *alloc_contig_pages(unsigned
}
#endif /* CONFIG_CONTIG_ALLOC */
-void free_contig_range(unsigned long pfn, unsigned int nr_pages)
+void free_contig_range(unsigned long pfn, unsigned long nr_pages)
{
- unsigned int count = 0;
+ unsigned long count = 0;
for (; nr_pages--; pfn++) {
struct page *page = pfn_to_page(pfn);
@@ -8983,7 +8983,7 @@ void free_contig_range(unsigned long pfn
count += page_count(page) != 1;
__free_page(page);
}
- WARN(count != 0, "%d pages are still in use!\n", count);
+ WARN(count != 0, "%lu pages are still in use!\n", count);
}
EXPORT_SYMBOL(free_contig_range);
_
Patches currently in -mm which might be from minchan@xxxxxxxxxx are
mm-remove-lru_add_drain_all-in-alloc_contig_range.patch
mm-page_alloc-dump-migrate-failed-pages.patch
mm-disable-lru-pagevec-during-the-migration-temporarily.patch
mm-replace-migrate_-with-lru_cache_.patch
mm-fs-invalidate-bh-lru-during-page-migration.patch
mm-vmstat-add-cma-statistics.patch
mm-cma-support-sysfs.patch
mm-cma-add-the-cma-instance-name-to-cma-trace-events.patch
mm-use-proper-type-for-cma_.patch
