diff options
| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2024-02-01 03:37:14 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-02-22 19:24:47 +0100 |
| commit | d818c98a52cce29da4f35b73e640bf293036fa03 (patch) | |
| tree | c4da2b39f554f58e55c8684cf3b58687f3845360 | |
| parent | mm: ptdump: add check_wx_pages debugfs attribute (diff) | |
| download | linux-d818c98a52cce29da4f35b73e640bf293036fa03.tar.xz linux-d818c98a52cce29da4f35b73e640bf293036fa03.zip | |
mm/cma: don't treat bad input arguments for cma_alloc() as its failure
Invalid cma_alloc() input scenarios - including excess allocation request
should neither be counted as CMA_ALLOC_FAIL nor 'cma->nr_pages_failed' be
updated when applicable with CONFIG_CMA_SYSFS. This also drops 'out' jump
label which has become redundant.
Link: https://lkml.kernel.org/r/20240201023714.3871061-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/cma.c | 10 |
1 files changed, 4 insertions, 6 deletions
@@ -441,13 +441,13 @@ struct page *cma_alloc(struct cma *cma, unsigned long count, trace_cma_alloc_start(name, count, align); if (!cma || !cma->count || !cma->bitmap) - goto out; + return page; pr_debug("%s(cma %p, name: %s, count %lu, align %d)\n", __func__, (void *)cma, cma->name, count, align); if (!count) - goto out; + return page; mask = cma_bitmap_aligned_mask(cma, align); offset = cma_bitmap_aligned_offset(cma, align); @@ -455,7 +455,7 @@ struct page *cma_alloc(struct cma *cma, unsigned long count, bitmap_count = cma_bitmap_pages_to_bits(cma, count); if (bitmap_count > bitmap_maxno) - goto out; + return page; for (;;) { spin_lock_irq(&cma->lock); @@ -514,15 +514,13 @@ struct page *cma_alloc(struct cma *cma, unsigned long count, } pr_debug("%s(): returned %p\n", __func__, page); -out: trace_cma_alloc_finish(name, pfn, page, count, align, ret); if (page) { count_vm_event(CMA_ALLOC_SUCCESS); cma_sysfs_account_success_pages(cma, count); } else { count_vm_event(CMA_ALLOC_FAIL); - if (cma) - cma_sysfs_account_fail_pages(cma, count); + cma_sysfs_account_fail_pages(cma, count); } return page; |