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Message-ID: <1433440693-21801-1-git-send-email-cmetcalf@ezchip.com>
Date: Thu, 4 Jun 2015 13:58:13 -0400
From: Chris Metcalf <cmetcalf@...hip.com>
To: <linux-kernel@...r.kernel.org>
CC: Chris Metcalf <cmetcalf@...hip.com>
Subject: [PATCH] tile: avoid a "label not used" warning in do_page_fault()
There are two different ifdef cases where the label is used,
but if neither is true, the label is unused and the compiler
generates a warning.
Refactor the code the way x86 does so that there is a
do_page_fault() that just does exception handling for
context tracking, and make __do_page_fault() a static inline
so that various cases can just return instead of doing a
jump to "done".
Signed-off-by: Chris Metcalf <cmetcalf@...hip.com>
---
arch/tile/mm/fault.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
index e83cc999da02..4787ee8f0705 100644
--- a/arch/tile/mm/fault.c
+++ b/arch/tile/mm/fault.c
@@ -699,11 +699,10 @@ struct intvec_state do_page_fault_ics(struct pt_regs *regs, int fault_num,
* interrupt away appropriately and return immediately. We can't do
* page faults for user code while in kernel mode.
*/
-void do_page_fault(struct pt_regs *regs, int fault_num,
- unsigned long address, unsigned long write)
+static inline void __do_page_fault(struct pt_regs *regs, int fault_num,
+ unsigned long address, unsigned long write)
{
int is_page_fault;
- enum ctx_state prev_state = exception_enter();
#ifdef CONFIG_KPROBES
/*
@@ -713,7 +712,7 @@ void do_page_fault(struct pt_regs *regs, int fault_num,
*/
if (notify_die(DIE_PAGE_FAULT, "page fault", regs, -1,
regs->faultnum, SIGSEGV) == NOTIFY_STOP)
- goto done;
+ return;
#endif
#ifdef __tilegx__
@@ -835,18 +834,22 @@ void do_page_fault(struct pt_regs *regs, int fault_num,
async->is_fault = is_page_fault;
async->is_write = write;
async->address = address;
- goto done;
+ return;
}
}
#endif
handle_page_fault(regs, fault_num, is_page_fault, address, write);
+}
-done:
+void do_page_fault(struct pt_regs *regs, int fault_num,
+ unsigned long address, unsigned long write)
+{
+ enum ctx_state prev_state = exception_enter();
+ __do_page_fault(regs, fault_num, address, write);
exception_exit(prev_state);
}
-
#if CHIP_HAS_TILE_DMA()
/*
* This routine effectively re-issues asynchronous page faults
--
2.1.2
--
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