Re: [PATCH 4.19 5/6] ARM: 8788/1: ftrace: remove old mcount support
From: Stefan Agner <stefan@agner.ch>
Date: 2022-01-11 21:05:18
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On 2021-12-20 11:57, Greg KH wrote:
On Fri, Dec 17, 2021 at 03:41:18PM +0100, Anders Roxell wrote:quoted
From: Stefan Agner <stefan@agner.ch> commit d3c61619568c88d48eccd5e74b4f84faa1440652 upstream. Commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6") raised the minimum GCC version to 4.6. Old mcount is only required for GCC versions older than 4.4.0. Hence old mcount support can be dropped too. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Russell King <redacted> Signed-off-by: Anders Roxell <redacted>Why is this needed for clang builds in 4.19?
As far as I remember, Clang tripped over this part: -#ifndef CONFIG_OLD_MCOUNT -#if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 4)) -#error Ftrace requires CONFIG_FRAME_POINTER=y with GCC older than 4.4.0. -#endif -#endif Since mcount support wasn't required upstream at that point, instead of fixing it for Clang I just removed it. -- Stefan _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel