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null_blk: Fix the description of the cache_size module argument

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[ Upstream commit 7942b226e6b84df13b46b76c01d3b6e07a1b349e ]

When executing modinfo null_blk, there is an error in the description
of module parameter mbps, and the output information of cache_size is
incomplete.The output of modinfo before and after applying this patch
is as follows:

Before:
[...]
parm:           cache_size:ulong
[...]
parm:           mbps:Cache size in MiB for memory-backed device.
		Default: 0 (none) (uint)
[...]

After:
[...]
parm:           cache_size:Cache size in MiB for memory-backed device.
		Default: 0 (none) (ulong)
[...]
parm:           mbps:Limit maximum bandwidth (in MiB/s).
		Default: 0 (no limit) (uint)
[...]

Fixes: 058efe000b ("null_blk: add module parameters for 4 options")
Signed-off-by: Genjian Zhang <zhanggenjian@kylinos.cn>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Genjian Zhang
2025-08-15 17:07:32 +08:00
committed by Greg Kroah-Hartman
parent 61a9491f63
commit 4f3cc1e7d5
1 changed files with 1 additions and 1 deletions
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2
drivers/block/null_blk/main.c
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@@ -223,7 +223,7 @@ MODULE_PARM_DESC(discard, "Support discard operations (requires memory-backed nu
static unsigned long g_cache_size;
module_param_named(cache_size, g_cache_size, ulong, 0444);
MODULE_PARM_DESC(mbps, "Cache size in MiB for memory-backed device. Default: 0 (none)");
MODULE_PARM_DESC(cache_size, "Cache size in MiB for memory-backed device. Default: 0 (none)");
static bool g_fua = true;
module_param_named(fua, g_fua, bool, 0444);