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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>, Jason Gunthorpe <jgg@mellanox.com>,
	Michal Hocko <mhocko@suse.com>,
	Bernard Metzler <bmt@zurich.ibm.com>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Sasha Levin <sashal@kernel.org>,
	linux-mm@kvack.org
Subject: [PATCH AUTOSEL 5.3 42/49] mm: add dummy can_do_mlock() helper
Date: Sun, 29 Sep 2019 13:30:42 -0400	[thread overview]
Message-ID: <20190929173053.8400-42-sashal@kernel.org> (raw)
In-Reply-To: <20190929173053.8400-1-sashal@kernel.org>

From: Arnd Bergmann <arnd@arndb.de>

[ Upstream commit 710ec38b0f633ab3e2581f07a73442d809e28ab0 ]

On kernels without CONFIG_MMU, we get a link error for the siw driver:

drivers/infiniband/sw/siw/siw_mem.o: In function `siw_umem_get':
siw_mem.c:(.text+0x4c8): undefined reference to `can_do_mlock'

This is probably not the only driver that needs the function and could
otherwise build correctly without CONFIG_MMU, so add a dummy variant that
always returns false.

Link: http://lkml.kernel.org/r/20190909204201.931830-1-arnd@arndb.de
Fixes: 2251334dcac9 ("rdma/siw: application buffer management")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Bernard Metzler <bmt@zurich.ibm.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 include/linux/mm.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 0334ca97c584d..fe4552e1c40b4 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1405,7 +1405,11 @@ extern void pagefault_out_of_memory(void);
 
 extern void show_free_areas(unsigned int flags, nodemask_t *nodemask);
 
+#ifdef CONFIG_MMU
 extern bool can_do_mlock(void);
+#else
+static inline bool can_do_mlock(void) { return false; }
+#endif
 extern int user_shm_lock(size_t, struct user_struct *);
 extern void user_shm_unlock(size_t, struct user_struct *);
 
-- 
2.20.1


  parent reply	other threads:[~2019-09-29 17:32 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-29 17:30 [PATCH AUTOSEL 5.3 01/49] MIPS: Ingenic: Disable broken BTB lookup optimization Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 02/49] clk: jz4740: Add TCU clock Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 03/49] MIPS: Don't use bc_false uninitialized in __mm_isBranchInstr Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 04/49] MIPS: tlbex: Explicitly cast _PAGE_NO_EXEC to a boolean Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 05/49] i2c-cht-wc: Fix lockdep warning Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 06/49] mfd: intel-lpss: Remove D3cold delay Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 07/49] PCI: tegra: Fix OF node reference leak Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 08/49] HID: wacom: Fix several minor compiler warnings Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 09/49] rtc: bd70528: fix driver dependencies Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 10/49] mips/atomic: Fix loongson_llsc_mb() wreckage Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 11/49] PCI: pci-hyperv: Fix build errors on non-SYSFS config Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 12/49] PCI: layerscape: Add the bar_fixed_64bit property to the endpoint driver Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 13/49] livepatch: Nullify obj->mod in klp_module_coming()'s error path Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 14/49] mips/atomic: Fix smp_mb__{before,after}_atomic() Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 15/49] ARM: 8898/1: mm: Don't treat faults reported from cache maintenance as writes Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 16/49] soundwire: intel: fix channel number reported by hardware Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 17/49] PCI: mobiveil: Fix the CPU base address setup in inbound window Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 18/49] ARM: 8875/1: Kconfig: default to AEABI w/ Clang Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 19/49] MIPS: lantiq: update the clock alias' for the mainline PCIe PHY driver Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 20/49] firmware: bcm47xx_nvram: Correct size_t printf format Sasha Levin
2019-09-29 19:39   ` Florian Fainelli
2019-10-05 22:53     ` Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 21/49] rtc: snvs: fix possible race condition Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 22/49] rtc: pcf85363/pcf85263: fix regmap error in set_time Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 23/49] power: supply: register HWMON devices with valid names Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 24/49] selinux: fix residual uses of current_security() for the SELinux blob Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 25/49] PCI: Add pci_info_ratelimited() to ratelimit PCI separately Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 26/49] HID: apple: Fix stuck function keys when using FN Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 27/49] PCI: rockchip: Propagate errors for optional regulators Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 28/49] PCI: histb: " Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 29/49] PCI: imx6: " Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 30/49] PCI: exynos: Propagate errors for optional PHYs Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 31/49] security: smack: Fix possible null-pointer dereferences in smack_socket_sock_rcv_skb() Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 32/49] PCI: Use static const struct, not const static struct Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 33/49] ARM: 8905/1: Emit __gnu_mcount_nc when using Clang 10.0.0 or newer Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 34/49] ARM: 8903/1: ensure that usable memory in bank 0 starts from a PMD-aligned address Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 35/49] i2c: tegra: Move suspend handling to NOIRQ phase Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 36/49] block, bfq: push up injection only after setting service time Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 37/49] fat: work around race with userspace's read via blockdev while mounting Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 38/49] pktcdvd: remove warning on attempting to register non-passthrough dev Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 39/49] hypfs: Fix error number left in struct pointer member Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 40/49] tools/power/x86/intel-speed-select: Fix high priority core mask over count Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 41/49] crypto: hisilicon - Fix double free in sec_free_hw_sgl() Sasha Levin
2019-09-29 17:30 ` Sasha Levin [this message]
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 43/49] kbuild: clean compressed initramfs image Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 44/49] ocfs2: wait for recovering done after direct unlock request Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 45/49] kmemleak: increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE default to 16K Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 46/49] arm64: consider stack randomization for mmap base only when necessary Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 47/49] mips: properly account for stack randomization and stack guard gap Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 48/49] arm: " Sasha Levin
2019-09-29 17:30 ` [PATCH AUTOSEL 5.3 49/49] arm: use STACK_TOP when computing mmap base address Sasha Levin

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