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um: Disable CONFIG_GCOV with MODULES

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CONFIG_GCOV doesn't work with modules, and for various reasons
it cannot work, see also
https://lore.kernel.org/r/d36ea54d8c0a8dd706826ba844a6f27691f45d55.camel@sipsolutions.net

Make CONFIG_GCOV depend on !MODULES to avoid anyone
running into issues there. This also means we need
not export the gcov symbols.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Johannes Berg 2021-03-15 23:47:31 +01:00 committed by Richard Weinberger
parent ea8e896cc1
commit ad3d199116
3 changed files with 1 additions and 17 deletions
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1
arch/um/Kconfig.debug
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@ -17,6 +17,7 @@ config GCOV
bool "Enable gcov support"
depends on DEBUG_INFO
depends on !KCOV
depends on !MODULES
help
This option allows developers to retrieve coverage data from a UML
session.

1
arch/um/kernel/Makefile
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@ -21,7 +21,6 @@ obj-y = config.o exec.o exitcode.o irq.o ksyms.o mem.o \
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
obj-$(CONFIG_GPROF) += gprof_syms.o
obj-$(CONFIG_GCOV) += gmon_syms.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o

16
arch/um/kernel/gmon_syms.c
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@ -1,16 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <linux/module.h>
extern void __bb_init_func(void *) __attribute__((weak));
EXPORT_SYMBOL(__bb_init_func);
extern void __gcov_init(void *) __attribute__((weak));
EXPORT_SYMBOL(__gcov_init);
extern void __gcov_merge_add(void *, unsigned int) __attribute__((weak));
EXPORT_SYMBOL(__gcov_merge_add);
extern void __gcov_exit(void) __attribute__((weak));
EXPORT_SYMBOL(__gcov_exit);