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| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2021-07-22 13:55:12 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-08-09 18:03:17 +0300 |
| commit | 1d7db834a027ecfb5ac93be2e8bb45bfcbbf6eaa (patch) | |
| tree | b41acc0ce44f9f892f0e060bc007ada40c7b63ec /kernel/dma | |
| parent | 36a21d51725af2ce0700c6ebcb6b9594aac658a6 (diff) | |
| download | linux-1d7db834a027ecfb5ac93be2e8bb45bfcbbf6eaa.tar.xz | |
dma-debug: use memory_intersects() directly
There is already a memory_intersects() helper in sections.h,
use memory_intersects() directly instead of private overlap().
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/debug.c | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index dadae6255d05..fe6efd181614 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -1064,20 +1064,10 @@ static void check_for_stack(struct device *dev, } } -static inline bool overlap(void *addr, unsigned long len, void *start, void *end) -{ - unsigned long a1 = (unsigned long)addr; - unsigned long b1 = a1 + len; - unsigned long a2 = (unsigned long)start; - unsigned long b2 = (unsigned long)end; - - return !(b1 <= a2 || a1 >= b2); -} - static void check_for_illegal_area(struct device *dev, void *addr, unsigned long len) { - if (overlap(addr, len, _stext, _etext) || - overlap(addr, len, __start_rodata, __end_rodata)) + if (memory_intersects(_stext, _etext, addr, len) || + memory_intersects(__start_rodata, __end_rodata, addr, len)) err_printk(dev, NULL, "device driver maps memory from kernel text or rodata [addr=%p] [len=%lu]\n", addr, len); } |