From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Helge Deller <deller@gmx.de>, Sasha Levin <sashal@kernel.org>,
linux-parisc@vger.kernel.org
Subject: [PATCH AUTOSEL 4.4 22/25] parisc: Fix compiler warnings in debug_core.c
Date: Fri, 27 Dec 2019 13:15:46 -0500 [thread overview]
Message-ID: <20191227181549.8040-22-sashal@kernel.org> (raw)
In-Reply-To: <20191227181549.8040-1-sashal@kernel.org>
From: Helge Deller <deller@gmx.de>
[ Upstream commit 75cf9797006a3a9f29a3a25c1febd6842a4a9eb2 ]
Fix this compiler warning:
kernel/debug/debug_core.c: In function ‘kgdb_cpu_enter’:
arch/parisc/include/asm/cmpxchg.h:48:3: warning: value computed is not used [-Wunused-value]
48 | ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
arch/parisc/include/asm/atomic.h:78:30: note: in expansion of macro ‘xchg’
78 | #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
| ^~~~
kernel/debug/debug_core.c:596:4: note: in expansion of macro ‘atomic_xchg’
596 | atomic_xchg(&kgdb_active, cpu);
| ^~~~~~~~~~~
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/parisc/include/asm/cmpxchg.h | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/parisc/include/asm/cmpxchg.h b/arch/parisc/include/asm/cmpxchg.h
index 0a90b965cccb..9849bef2a766 100644
--- a/arch/parisc/include/asm/cmpxchg.h
+++ b/arch/parisc/include/asm/cmpxchg.h
@@ -43,8 +43,14 @@ __xchg(unsigned long x, __volatile__ void *ptr, int size)
** if (((unsigned long)p & 0xf) == 0)
** return __ldcw(p);
*/
-#define xchg(ptr, x) \
- ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
+#define xchg(ptr, x) \
+({ \
+ __typeof__(*(ptr)) __ret; \
+ __typeof__(*(ptr)) _x_ = (x); \
+ __ret = (__typeof__(*(ptr))) \
+ __xchg((unsigned long)_x_, (ptr), sizeof(*(ptr))); \
+ __ret; \
+})
/* bug catcher for when unsupported size is used - won't link */
extern void __cmpxchg_called_with_bad_pointer(void);
--
2.20.1
next prev parent reply other threads:[~2019-12-27 18:16 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-27 18:15 [PATCH AUTOSEL 4.4 01/25] locking/spinlock/debug: Fix various data races Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 02/25] netfilter: ctnetlink: netns exit must wait for callbacks Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 03/25] ARM: vexpress: Set-up shared OPP table instead of individual for each CPU Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 04/25] netfilter: uapi: Avoid undefined left-shift in xt_sctp.h Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 05/25] netfilter: bridge: make sure to pull arp header in br_nf_forward_arp() Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 06/25] af_packet: set defaule value for tmo Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 07/25] fjes: fix missed check in fjes_acpi_add Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 08/25] ARM: dts: am437x-gp/epos-evm: fix panel compatible Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 09/25] tty: serial: msm_serial: Fix lockup for sysrq and oops Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 10/25] net: usb: lan78xx: Fix suspend/resume PHY register access error Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 11/25] powerpc: Ensure that swiotlb buffer is allocated from low memory Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 12/25] 6pack,mkiss: fix possible deadlock Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 13/25] bnx2x: Do not handle requests from VFs after parity Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 14/25] bnx2x: Fix logic to get total no. of PFs per engine Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 15/25] net: usb: lan78xx: Fix error message format specifier Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 16/25] rfkill: Fix incorrect check to avoid NULL pointer dereference Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 17/25] ASoC: wm8962: fix lambda value Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 18/25] regulator: rn5t618: fix module aliases Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 19/25] kconfig: don't crash on NULL expressions in expr_eq() Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 20/25] net: qlogic: Fix error paths in ql_alloc_large_buffers() Sasha Levin
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 21/25] net: nfc: nci: fix a possible sleep-in-atomic-context bug in nci_uart_tty_receive() Sasha Levin
2019-12-27 18:15 ` Sasha Levin [this message]
2019-12-27 18:15 ` [PATCH AUTOSEL 4.4 23/25] net: hisilicon: Fix a BUG trigered by wrong bytes_compl Sasha Levin
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