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authorNeilBrown <neil@brown.name>2018-03-20 11:29:51 +0300
committerJames Hogan <jhogan@kernel.org>2018-03-22 02:43:39 +0300
commit891731f6a5dbe508d12443175a7e166a2fba616a (patch)
treec05df82e54139b41ffbd2ed9763514ca65f17746 /arch
parenta821328c2f3003b908880792d71b2781b44fa53c (diff)
downloadlinux-891731f6a5dbe508d12443175a7e166a2fba616a.tar.xz
MIPS: ralink: Remove ralink_halt()
ralink_halt() does nothing that machine_halt() doesn't already do, so it adds no value. It actually causes incorrect behaviour due to the "unreachable()" at the end. This tells the compiler that the end of the function will never be reached, which isn't true. The compiler responds by not adding a 'return' instruction, so control simply moves on to whatever bytes come afterwards in memory. In my tested, that was the ralink_restart() function. This means that an attempt to 'halt' the machine would actually cause a reboot. So remove ralink_halt() so that a 'halt' really does halt. Fixes: c06e836ada59 ("MIPS: ralink: adds reset code") Signed-off-by: NeilBrown <neil@brown.name> Cc: John Crispin <john@phrozen.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: <stable@vger.kernel.org> # 3.9+ Patchwork: https://patchwork.linux-mips.org/patch/18851/ Signed-off-by: James Hogan <jhogan@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/ralink/reset.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/mips/ralink/reset.c b/arch/mips/ralink/reset.c
index 64543d66e76b..e9531fea23a2 100644
--- a/arch/mips/ralink/reset.c
+++ b/arch/mips/ralink/reset.c
@@ -96,16 +96,9 @@ static void ralink_restart(char *command)
unreachable();
}
-static void ralink_halt(void)
-{
- local_irq_disable();
- unreachable();
-}
-
static int __init mips_reboot_setup(void)
{
_machine_restart = ralink_restart;
- _machine_halt = ralink_halt;
return 0;
}