Arnd Bergmann <arnd@xxxxxxxx> wrote: > With KASAN and a couple of other patches applied, this driver is one > of the few remaining ones that actually use more than 2048 bytes of > kernel stack: > > broadcom/brcm80211/brcmsmac/phy/phy_n.c: In function 'wlc_phy_workarounds_nphy_gainctrl': > broadcom/brcm80211/brcmsmac/phy/phy_n.c:16065:1: warning: the frame size of 3264 bytes is larger than 2048 bytes [-Wframe-larger-than=] > broadcom/brcm80211/brcmsmac/phy/phy_n.c: In function 'wlc_phy_workarounds_nphy': > broadcom/brcm80211/brcmsmac/phy/phy_n.c:17138:1: warning: the frame size of 2864 bytes is larger than 2048 bytes [-Wframe-larger-than=] > > Here, I'm reducing the stack size by marking as many local variables as > 'static const' as I can without changing the actual code. > > This is the first of three patches to improve the stack usage in this > driver. It would be good to have this backported to stabl kernels > to get all drivers in 'allmodconfig' below the 2048 byte limit so > we can turn on the frame warning again globally, but I realize that > the patch is larger than the normal limit for stable backports. > > The other two patches do not need to be backported. > > Cc: <stable@xxxxxxxxxxxxxxx> > Acked-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx> > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Patch applied to wireless-drivers.git, thanks. c503dd38f850 brcmsmac: make some local variables 'static const' to reduce stack size -- https://patchwork.kernel.org/patch/9967145/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
