From 03df2c59562a2d8851fea32f833e48193f6cd8ad Mon Sep 17 00:00:00 2001 From: Matthias Kaehlcke Date: Thu, 5 Oct 2017 11:28:47 -0700 Subject: [PATCH] md: raid10: remove VLAIS 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 Reviewed-by: Guenter Roeck Signed-off-by: Shaohua Li Signed-off-by: Nathan Chancellor Signed-off-by: Greg Kroah-Hartman --- drivers/md/raid10.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index e786546..52ddfa0 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -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; } -- 2.7.4