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| author | Arnd Bergmann <arnd@arndb.de> | 2020-05-05 16:01:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-29 09:03:05 +0100 |
| commit | 6d7fc05f8862771c49776e256ad932669ca9b167 (patch) | |
| tree | ae1809091af11f4b032636331bf1b1167dd08d5a /scripts/patch-kernel | |
| parent | 8015c658f167e08303d77c167c6a5644a6e07ba9 (diff) | |
mtd: lpddr: fix excessive stack usage with clang
[ Upstream commit 3e1b6469f8324bee5927b063e2aca30d3e56b907 ]
Building lpddr2_nvm with clang can result in a giant stack usage
in one function:
drivers/mtd/lpddr/lpddr2_nvm.c:399:12: error: stack frame size of 1144 bytes in function 'lpddr2_nvm_probe' [-Werror,-Wframe-larger-than=]
The problem is that clang decides to build a copy of the mtd_info
structure on the stack and then do a memcpy() into the actual version. It
shouldn't really do it that way, but it's not strictly a bug either.
As a workaround, use a static const version of the structure to assign
most of the members upfront and then only set the few members that
require runtime knowledge at probe time.
Fixes: 96ba9dd65788 ("mtd: lpddr: add driver for LPDDR2-NVM PCM memories")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200505140136.263461-1-arnd@arndb.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions