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Re: [Qemu-devel] [PATCH 4/8] usb: fix unbounded stack for xhci_dma_write

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 4/8] usb: fix unbounded stack for xhci_dma_write_u32s
Date: Wed, 9 Mar 2016 08:53:19 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

On 09/03/2016 06:08, Peter Xu wrote:
> pxdev:bin# gcc -v
> Using built-in specs.
> COLLECT_GCC=/bin/gcc
> COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper
> Target: x86_64-redhat-linux
> Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
> --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla 
> --enable-bootstrap --enable-shared --enable-threads=posix 
> --enable-checking=release --with-system-zlib --enable-__cxa_atexit 
> --disable-libunwind-exceptions --enable-gnu-unique-object 
> --enable-linker-build-id --with-linker-hash-style=gnu 
> --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin 
> --enable-initfini-array --disable-libgcj 
> --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install
> --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install
>  --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 
> --build=x86_64-redhat-linux
> Thread model: posix
> gcc version 4.8.5 20150623 (Red Hat 4.8.5-4) (GCC)
> Do you know why "might not be inlinable"? Failed to figure it out
> myself as mentioned in cover letter..

It's just a difference in compiler versions.  But ARRAY_SIZE should be
enough to fix it.


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