From 3e7a8716e20b759eec0ad88145255bb33174f0c8 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 13 Jan 2015 17:10:58 +0100 Subject: mISDN: avoid arch specific __builtin_return_address call Not all architectures are able to call __builtin_return_address(). On ARM, the mISDN code produces this warning: hardware/mISDN/w6692.c: In function 'w6692_dctrl': hardware/mISDN/w6692.c:1181:75: warning: unsupported argument to '__builtin_return_address' pr_debug("%s: %s dev(%d) open from %p\n", card->name, __func__, ^ hardware/mISDN/mISDNipac.c: In function 'open_dchannel': hardware/mISDN/mISDNipac.c:759:75: warning: unsupported argument to '__builtin_return_address' pr_debug("%s: %s dev(%d) open from %p\n", isac->name, __func__, ^ In a lot of cases, this is relatively easy to work around by passing the value of __builtin_return_address(0) from the callers into the functions that want it. One exception is the indirect 'open' function call in struct isac_hw. While it would be possible to fix this as well, this patch only addresses the other callers properly and lets this one return the direct parent function, which should be good enough. Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller --- drivers/isdn/hardware/mISDN/w6692.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/isdn/hardware/mISDN/w6692.c') diff --git a/drivers/isdn/hardware/mISDN/w6692.c b/drivers/isdn/hardware/mISDN/w6692.c index de69f6828c76..741675525b53 100644 --- a/drivers/isdn/hardware/mISDN/w6692.c +++ b/drivers/isdn/hardware/mISDN/w6692.c @@ -1176,10 +1176,10 @@ w6692_l1callback(struct dchannel *dch, u32 cmd) } static int -open_dchannel(struct w6692_hw *card, struct channel_req *rq) +open_dchannel(struct w6692_hw *card, struct channel_req *rq, void *caller) { pr_debug("%s: %s dev(%d) open from %p\n", card->name, __func__, - card->dch.dev.id, __builtin_return_address(1)); + card->dch.dev.id, caller); if (rq->protocol != ISDN_P_TE_S0) return -EINVAL; if (rq->adr.channel == 1) @@ -1207,7 +1207,7 @@ w6692_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg) case OPEN_CHANNEL: rq = arg; if (rq->protocol == ISDN_P_TE_S0) - err = open_dchannel(card, rq); + err = open_dchannel(card, rq, __builtin_return_address(0)); else err = open_bchannel(card, rq); if (err) -- cgit v1.2.3-59-g8ed1b