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| author | Arnd Bergmann <arnd@arndb.de> | 2020-05-05 17:01:16 +0300 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2020-08-27 15:36:07 +0300 |
| commit | 3e1b6469f8324bee5927b063e2aca30d3e56b907 (patch) | |
| tree | dee7c74719f1f3710c9838d924fb4fbf6d3b2599 /drivers/dma/dmaengine.c | |
| parent | 1d0e5ebf0caaaadbc93470850d17786f94c776c2 (diff) | |
| download | linux-3e1b6469f8324bee5927b063e2aca30d3e56b907.tar.xz | |
mtd: lpddr: fix excessive stack usage with clang
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
Diffstat (limited to 'drivers/dma/dmaengine.c')
0 files changed, 0 insertions, 0 deletions