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Replace P2ALIGN with P2ALIGN_TYPED and delete P2ALIGN.

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In P2ALIGN, the result would be incorrect when align is unsigned
integer and x is larger than max value of the type of align.
In that case, -(align) would be a positive integer, which means
high bits would be zero and finally stay zero after '&' when
align is converted to a larger integer type.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Youzhong Yang <yyang@mathworks.com>
Signed-off-by: Qiuhao Chen <chenqiuhao1997@gmail.com>
Closes #15940
This commit is contained in:
chenqiuhao1997
2024-05-10 23:47:21 +08:00
committed by GitHub
parent 1ede0c716b
commit 41ae864b69
17 changed files with 44 additions and 31 deletions
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module/os/linux/zfs/zvol_os.c
+1 -1
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@@ -384,7 +384,7 @@ zvol_discard(zv_request_t *zvr)
*/
if (!io_is_secure_erase(bio, rq)) {
start = P2ROUNDUP(start, zv->zv_volblocksize);
end = P2ALIGN(end, zv->zv_volblocksize);
end = P2ALIGN_TYPED(end, zv->zv_volblocksize, uint64_t);
size = end - start;
}