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authorArnd Bergmann <arnd@arndb.de>2023-04-17 22:56:50 +0200
committerMiquel Raynal <miquel.raynal@bootlin.com>2023-06-01 18:12:31 +0200
commit0ea923f443350c8c5cca6eef5b748d52b903f46c (patch)
tree7b2c507fd40ef8e6709d6be04325afdb47c678c7 /drivers/mtd
parent444c17cfbc855bf6c1524f3813f6f667d9b708ff (diff)
mtdchar: mark bits of ioctl handler noinline
The addition of the mtdchar_read_ioctl() function caused the stack usage of mtdchar_ioctl() to grow beyond the warning limit on 32-bit architectures with gcc-13: drivers/mtd/mtdchar.c: In function 'mtdchar_ioctl': drivers/mtd/mtdchar.c:1229:1: error: the frame size of 1488 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] Mark both the read and write portions as noinline_for_stack to ensure they don't get inlined and use separate stack slots to reduce the maximum usage, both in the mtdchar_ioctl() and combined with any of its callees. Fixes: 095bb6e44eb1 ("mtdchar: add MEMREAD ioctl") Cc: stable@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Richard Weinberger <richard@nod.at> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20230417205654.1982368-1-arnd@kernel.org
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/mtdchar.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 01f1c6792df9..8dc4f5c493fc 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -590,8 +590,8 @@ static void adjust_oob_length(struct mtd_info *mtd, uint64_t start,
(end_page - start_page + 1) * oob_per_page);
}
-static int mtdchar_write_ioctl(struct mtd_info *mtd,
- struct mtd_write_req __user *argp)
+static noinline_for_stack int
+mtdchar_write_ioctl(struct mtd_info *mtd, struct mtd_write_req __user *argp)
{
struct mtd_info *master = mtd_get_master(mtd);
struct mtd_write_req req;
@@ -688,8 +688,8 @@ static int mtdchar_write_ioctl(struct mtd_info *mtd,
return ret;
}
-static int mtdchar_read_ioctl(struct mtd_info *mtd,
- struct mtd_read_req __user *argp)
+static noinline_for_stack int
+mtdchar_read_ioctl(struct mtd_info *mtd, struct mtd_read_req __user *argp)
{
struct mtd_info *master = mtd_get_master(mtd);
struct mtd_read_req req;