Messages in this thread | | | From | Måns Rullgård <> | Subject | Re: [PATCH] x86, acpi: LLVMLinux: Remove nested functions from Thinkpad ACPI | Date | Wed, 12 Feb 2014 21:27:59 +0000 |
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Behan Webster <behanw@converseincode.com> writes:
> On 02/12/14 13:11, Christoph Hellwig wrote: >> On Wed, Feb 12, 2014 at 09:58:46PM +0100, dl9pf@gmx.de wrote: >>> being able to compile the Linux kernel with Clang. The use of nested functions >>> blocks this effort. >> Is there any good way to make gcc warn about the use of nested functions? > Interesting idea. > > '-Wtrampolines' > Warn about trampolines generated for pointers to nested functions. > > A trampoline is a small piece of data or code that is created at > run time on the stack when the address of a nested function is > taken, and is used to call the nested function indirectly. For > some targets, it is made up of data only and thus requires no > special treatment. But, for most targets, it is made up of code > and thus requires the stack to be made executable in order for the > program to work properly. > > That might work.
That sounds like it will only warn if a trampoline is needed. A nested function whose address isn't taken, as is the case here, wouldn't trigger this warning.
-- Måns Rullgård mans@mansr.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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