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Subject[PATCH] kallsyms: work around bogus -Wrestrict warning
Date
gcc -O3 produces some really odd warnings for this file:

kernel/kallsyms.c: In function 'sprint_symbol':
kernel/kallsyms.c:369:3: error: 'strcpy' source argument is the same as destination [-Werror=restrict]
strcpy(buffer, name);
^~~~~~~~~~~~~~~~~~~~
kernel/kallsyms.c: In function 'sprint_symbol_no_offset':
kernel/kallsyms.c:369:3: error: 'strcpy' source argument is the same as destination [-Werror=restrict]
strcpy(buffer, name);
^~~~~~~~~~~~~~~~~~~~
kernel/kallsyms.c: In function 'sprint_backtrace':
kernel/kallsyms.c:369:3: error: 'strcpy' source argument is the same as destination [-Werror=restrict]
strcpy(buffer, name);
^~~~~~~~~~~~~~~~~~~~

This obviously cannot be since it is preceded by an 'if (name != buffer)'
check.

Using sprintf() instead of strcpy() is a bit wasteful but is
the best workaround I could come up with.

Fixes: mmtom ("init/Kconfig: enable -O3 for all arches")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
kernel/kallsyms.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index d812b90f4c86..726b8eeb223e 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -366,7 +366,7 @@ static int __sprint_symbol(char *buffer, unsigned long address,
return sprintf(buffer, "0x%lx", address - symbol_offset);

if (name != buffer)
- strcpy(buffer, name);
+ sprintf(buffer, "%s", name);
len = strlen(buffer);
offset -= symbol_offset;

--
2.20.0
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