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Jiri Olsa d1d2e7d014 perf tools: Fix compilation errors on gcc8 
[ Upstream commit a09603f851 ]

We are getting following warnings on gcc8 that break compilation:

  $ make
    CC       jvmti/jvmti_agent.o
  jvmti/jvmti_agent.c: In function ‘jvmti_open’:
  jvmti/jvmti_agent.c:252:35: error: ‘/jit-’ directive output may be truncated \
    writing 5 bytes into a region of size between 1 and 4096 [-Werror=format-truncation=]
    snprintf(dump_path, PATH_MAX, "%s/jit-%i.dump", jit_path, getpid());

There's no point in checking the result of snprintf call in
jvmti_open, the following open call will fail in case the
name is mangled or too long.

Using tools/lib/ function scnprintf that touches the return value from
the snprintf() calls and thus get rid of those warnings.

  $ make DEBUG=1
    CC       arch/x86/util/perf_regs.o
  arch/x86/util/perf_regs.c: In function ‘arch_sdt_arg_parse_op’:
  arch/x86/util/perf_regs.c:229:4: error: ‘strncpy’ output truncated before terminating nul
  copying 2 bytes from a string of the same length [-Werror=stringop-truncation]
    strncpy(prefix, "+0", 2);
    ^~~~~~~~~~~~~~~~~~~~~~~~

Using scnprintf instead of the strncpy (which we know is safe in here)
to get rid of that warning.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180702134202.17745-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-24 13:09:16 +02:00
arch ARC: Improve cmpxchg syscall implementation 2018-08-24 13:09:15 +02:00
block block: sed-opal: Fix a couple off by one bugs 2018-08-24 13:09:03 +02:00
certs License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crypto crypto: skcipher - fix crash flushing dcache in error path 2018-08-17 21:01:10 +02:00
Documentation kbuild: verify that $DEPMOD is installed 2018-08-17 21:01:10 +02:00
drivers scsi: qedi: Send driver state to MFW 2018-08-24 13:09:15 +02:00
firmware License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fs ceph: fix dentry leak in splice_dentry() 2018-08-24 13:09:07 +02:00
include net/sched: act_tunnel_key: fix NULL dereference when 'goto chain' is used 2018-08-24 13:09:14 +02:00
init init: rename and re-order boot_cpu_state_init() 2018-08-15 18:12:48 +02:00
ipc ipc/shm: fix shmat() nil address after round-down when remapping 2018-05-30 07:51:49 +02:00
kernel tracing: Use __printf markup to silence compiler 2018-08-24 13:09:12 +02:00
lib ioremap: Update pgtable free interfaces with addr 2018-08-17 21:01:11 +02:00
mm kasan: fix shadow_size calculation error in kasan_module_alloc 2018-08-24 13:09:12 +02:00
net netfilter: nf_conntrack: Fix possible possible crash on module loading. 2018-08-24 13:09:15 +02:00
samples samples/bpf: Check the error of write() and read() 2018-08-24 13:09:12 +02:00
scripts kconfig: fix line numbers for if-entries in menu tree 2018-08-24 13:09:06 +02:00
security Smack: Mark inode instant in smack_task_to_inode 2018-08-24 13:09:04 +02:00
sound ALSA: seq: Fix UBSAN warning at SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT ioctl 2018-08-24 13:09:05 +02:00
tools perf tools: Fix compilation errors on gcc8 2018-08-24 13:09:16 +02:00
usr initramfs: fix initramfs rebuilds w/ compression after disabling 2017-11-03 07:39:19 -07:00
virt KVM: arm/arm64: Drop resource size check for GICV window 2018-08-24 13:09:03 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: rpm-pkg: keep spec file until make mrproper 2018-02-13 10:19:46 +01:00
.mailmap .mailmap: Add Maciej W. Rozycki's Imagination e-mail address 2017-11-10 12:16:15 -08:00
COPYING
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS dt-bindings: Document mti,mips-cpc binding 2018-03-15 10:54:35 +01:00
Makefile Linux 4.14.66 2018-08-22 07:46:11 +02:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.