linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Russell King <linux@arm.linux.org.uk>,
	Stefan Agner <stefan@agner.ch>, Nicolas Pitre <nico@linaro.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Olof Johansson <olof@lixom.net>,
	Nick Desaulniers <ndesaulniers@google.com>
Subject: [PATCH 4.9 46/50] bus: arm-cci: remove unnecessary unreachable()
Date: Tue,  4 Dec 2018 11:50:41 +0100	[thread overview]
Message-ID: <20181204103716.788764938@linuxfoundation.org> (raw)
In-Reply-To: <20181204103714.485546262@linuxfoundation.org>

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stefan Agner <stefan@agner.ch>

(commit 10d8713429d345867fc8998d6193b233c0cab28c upstream)

Mixing asm and C code is not recommended in a naked function by
gcc and leads to an error when using clang:
  drivers/bus/arm-cci.c:2107:2: error: non-ASM statement in naked
  function is not supported
        unreachable();
        ^

While the function is marked __naked it actually properly return
in asm. There is no need for the unreachable() call.

GCC 7.2 generates identical object files before and after, other
than (for obvious reasons) the line numbers generated by
WANT_WARN_ON_SLOWPATH for all the WARN()s appearing later in the
file.

Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Nicolas Pitre <nico@linaro.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/bus/arm-cci.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -2103,8 +2103,6 @@ asmlinkage void __naked cci_enable_port_
 	[sizeof_struct_cpu_port] "i" (sizeof(struct cpu_port)),
 	[sizeof_struct_ace_port] "i" (sizeof(struct cci_ace_port)),
 	[offsetof_port_phys] "i" (offsetof(struct cci_ace_port, phys)) );
-
-	unreachable();
 }
 
 /**



  parent reply	other threads:[~2018-12-04 11:09 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-04 10:49 [PATCH 4.9 00/50] 4.9.143-stable review Greg Kroah-Hartman
2018-12-04 10:49 ` [PATCH 4.9 01/50] mm/huge_memory: rename freeze_page() to unmap_page() Greg Kroah-Hartman
2018-12-04 10:49 ` [PATCH 4.9 02/50] mm/huge_memory.c: reorder operations in __split_huge_page_tail() Greg Kroah-Hartman
2018-12-04 10:49 ` [PATCH 4.9 03/50] mm/huge_memory: splitting set mapping+index before unfreeze Greg Kroah-Hartman
2018-12-04 10:49 ` [PATCH 4.9 04/50] mm/huge_memory: fix lockdep complaint on 32-bit i_size_read() Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 05/50] mm/khugepaged: collapse_shmem() stop if punched or truncated Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 06/50] shmem: shmem_charge: verify max_block is not exceeded before inode update Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 07/50] shmem: introduce shmem_inode_acct_block Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 08/50] mm/khugepaged: fix crashes due to misaccounted holes Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 09/50] mm/khugepaged: collapse_shmem() remember to clear holes Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 10/50] mm/khugepaged: minor reorderings in collapse_shmem() Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 11/50] mm/khugepaged: collapse_shmem() without freezing new_page Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 12/50] mm/khugepaged: collapse_shmem() do not crash on Compound Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 13/50] media: em28xx: Fix use-after-free when disconnecting Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 14/50] Revert "wlcore: Add missing PM call for wlcore_cmd_wait_for_event_or_timeout()" Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 15/50] net: skb_scrub_packet(): Scrub offload_fwd_mark Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 16/50] rapidio/rionet: do not free skb before reading its length Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 17/50] s390/qeth: fix length check in SNMP processing Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 18/50] usbnet: ipheth: fix potential recvmsg bug and recvmsg bug 2 Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 19/50] kvm: mmu: Fix race in emulated page table writes Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 20/50] kvm: svm: Ensure an IBPB on all affected CPUs when freeing a vmcb Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 21/50] KVM: X86: Fix scan ioapic use-before-initialization Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 22/50] xtensa: enable coprocessors that are being flushed Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 23/50] xtensa: fix coprocessor context offset definitions Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 24/50] Btrfs: ensure path name is null terminated at btrfs_control_ioctl Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 25/50] perf/x86/intel: Move branch tracing setup to the Intel-specific source file Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 26/50] perf/x86/intel: Add generic branch tracing check to intel_pmu_has_bts() Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 27/50] fs: fix lost error code in dio_complete Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 28/50] ALSA: wss: Fix invalid snd_free_pages() at error path Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 29/50] ALSA: ac97: Fix incorrect bit shift at AC97-SPSA control write Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 30/50] ALSA: control: Fix race between adding and removing a user element Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 31/50] ALSA: sparc: Fix invalid snd_free_pages() at error path Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 32/50] ext2: fix potential use after free Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 33/50] dmaengine: at_hdmac: fix memory leak in at_dma_xlate() Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 34/50] dmaengine: at_hdmac: fix module unloading Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 35/50] btrfs: release metadata before running delayed refs Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 36/50] USB: usb-storage: Add new IDs to ums-realtek Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 37/50] usb: core: quirks: add RESET_RESUME quirk for Cherry G230 Stream series Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 38/50] Revert "usb: dwc3: gadget: skip Set/Clear Halt when invalid" Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 39/50] iio:st_magn: Fix enable device after trigger Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 40/50] mm: use swp_offset as key in shmem_replace_page() Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 41/50] Drivers: hv: vmbus: check the creation_status in vmbus_establish_gpadl() Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 42/50] misc: mic/scif: fix copy-paste error in scif_create_remote_lookup Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 43/50] efi/libstub: arm: support building with clang Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 44/50] ARM: 8766/1: drop no-thumb-interwork in EABI mode Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 45/50] ARM: 8767/1: add support for building ARM kernel with clang Greg Kroah-Hartman
2018-12-04 10:50 ` Greg Kroah-Hartman [this message]
2018-12-04 10:50 ` [PATCH 4.9 47/50] ARM: trusted_foundations: do not use naked function Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 48/50] workqueue: avoid clang warning Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 49/50] efi/libstub: Make file I/O chunking x86-specific Greg Kroah-Hartman
2018-12-04 10:50 ` [PATCH 4.9 50/50] kbuild: Set KBUILD_CFLAGS before incl. arch Makefile Greg Kroah-Hartman
2018-12-04 15:52 ` [PATCH 4.9 00/50] 4.9.143-stable review kernelci.org bot
2018-12-04 21:40 ` Guenter Roeck
2018-12-05  5:12 ` Naresh Kamboju
2018-12-05  9:30 ` Jon Hunter
2018-12-05 23:54 ` shuah

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20181204103716.788764938@linuxfoundation.org \
    --to=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@arm.linux.org.uk \
    --cc=ndesaulniers@google.com \
    --cc=nico@linaro.org \
    --cc=olof@lixom.net \
    --cc=robin.murphy@arm.com \
    --cc=stable@vger.kernel.org \
    --cc=stefan@agner.ch \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).