From: Sergey Senozhatsky <senozhatsky@chromium.org>
Date: Mon, 3 Mar 2025 02:03:28 +0000 (+0900)
Subject: zram: add might_sleep to zcomp API
X-Git-Tag: v6.15-rc1~81^2~247
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2ad951865aa7849f203a771d59ec1a0f1356a34c;p=thirdparty%2Fkernel%2Flinux.git

zram: add might_sleep to zcomp API

Explicitly state that zcomp compress/decompress must be called from
non-atomic context.

Link: https://lkml.kernel.org/r/20250303022425.285971-20-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Kairui Song <ryncsn@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Yosry Ahmed <yosry.ahmed@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
index a1d627054bb15..d26a58c67e95f 100644
--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -146,6 +146,7 @@ int zcomp_compress(struct zcomp *comp, struct zcomp_strm *zstrm,
 	};
 	int ret;
 
+	might_sleep();
 	ret = comp->ops->compress(comp->params, &zstrm->ctx, &req);
 	if (!ret)
 		*dst_len = req.dst_len;
@@ -162,6 +163,7 @@ int zcomp_decompress(struct zcomp *comp, struct zcomp_strm *zstrm,
 		.dst_len = PAGE_SIZE,
 	};
 
+	might_sleep();
 	return comp->ops->decompress(comp->params, &zstrm->ctx, &req);
 }