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x86/speculation: Add cpu_show_gds() prototype
commit a57c27c upstream. The newly added function has two definitions but no prototypes: drivers/base/cpu.c:605:16: error: no previous prototype for 'cpu_show_gds' [-Werror=missing-prototypes] Add a declaration next to the other ones for this file to avoid the warning. Fixes: 8974eb5 ("x86/speculation: Add Gather Data Sampling mitigation") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Tested-by: Daniel Sneddon <daniel.sneddon@linux.intel.com> Cc: stable@kernel.org Link: https://lore.kernel.org/all/20230809130530.1913368-1-arnd%40kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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