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md: raid10: remove VLAIS

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commit 584ed9fa9532f8b9d5955628ff87ee3b2ab9f5a9 upstream.

The raid10 driver can't be built with clang since it uses a variable
length array in a structure (VLAIS):

drivers/md/raid10.c:4583:17: error: fields must have a constant size:
  'variable length array in structure' extension will never be supported

Allocate the r10bio struct with kmalloc instead of using the VLAIS
construct.

Shaohua: set the MD_RECOVERY_INTR bit
Neil Brown: use GFP_NOIO

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthias Kaehlcke 2017-10-05 11:28:47 -07:00 committed by Greg Kroah-Hartman
parent 487467e7d0
commit 03df2c5956
1 changed files with 10 additions and 5 deletions
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15
drivers/md/raid10.c
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@ -4591,15 +4591,18 @@ static int handle_reshape_read_error(struct mddev *mddev,
/* Use sync reads to get the blocks from somewhere else */
int sectors = r10_bio->sectors;
struct r10conf *conf = mddev->private;
struct {
struct r10bio r10_bio;
struct r10dev devs[conf->copies];
} on_stack;
struct r10bio *r10b = &on_stack.r10_bio;
struct r10bio *r10b;
int slot = 0;
int idx = 0;
struct page **pages;
r10b = kmalloc(sizeof(*r10b) +
sizeof(struct r10dev) * conf->copies, GFP_NOIO);
if (!r10b) {
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
return -ENOMEM;
}
/* reshape IOs share pages from .devs[0].bio */
pages = get_resync_pages(r10_bio->devs[0].bio)->pages;
@ -4648,11 +4651,13 @@ static int handle_reshape_read_error(struct mddev *mddev,
/* couldn't read this block, must give up */
set_bit(MD_RECOVERY_INTR,
&mddev->recovery);
kfree(r10b);
return -EIO;
}
sectors -= s;
idx++;
}
kfree(r10b);
return 0;
}