24 Dec, 2016
1 commit
-
Pull perf fixes from Ingo Molnar:
"On the kernel side there's two x86 PMU driver fixes and a uprobes fix,
plus on the tooling side there's a number of fixes and some late
updates"* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
perf sched timehist: Fix invalid period calculation
perf sched timehist: Remove hardcoded 'comm_width' check at print_summary
perf sched timehist: Enlarge default 'comm_width'
perf sched timehist: Honour 'comm_width' when aligning the headers
perf/x86: Fix overlap counter scheduling bug
perf/x86/pebs: Fix handling of PEBS buffer overflows
samples/bpf: Move open_raw_sock to separate header
samples/bpf: Remove perf_event_open() declaration
samples/bpf: Be consistent with bpf_load_program bpf_insn parameter
tools lib bpf: Add bpf_prog_{attach,detach}
samples/bpf: Switch over to libbpf
perf diff: Do not overwrite valid build id
perf annotate: Don't throw error for zero length symbols
perf bench futex: Fix lock-pi help string
perf trace: Check if MAP_32BIT is defined (again)
samples/bpf: Make perf_event_read() static
uprobes: Fix uprobes on MIPS, allow for a cache flush after ixol breakpoint creation
samples/bpf: Make samples more libbpf-centric
tools lib bpf: Add flags to bpf_create_map()
tools lib bpf: use __u32 from linux/types.h
...
20 Dec, 2016
1 commit
-
Commit d8c5b17f2bc0 ("samples: bpf: add userspace example for attaching
eBPF programs to cgroups") added these functions to samples/libbpf, but
during this merge all of the samples libbpf functionality is shifting to
tools/lib/bpf. Shift these functions there.Committer notes:
Use bzero + attr.FIELD = value instead of 'attr = { .FIELD = value, just
like the other wrapper calls to sys_bpf with bpf_attr to make this build
in older toolchais, such as the ones in CentOS 5 and 6.Signed-off-by: Joe Stringer
Cc: Alexei Starovoitov
Cc: Daniel Borkmann
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-au2zvtsh55vqeo3v3uw7jr4c@git.kernel.org
Link: https://github.com/joestringer/linux/commit/353e6f298c3d0a92fa8bfa61ff898c5050261a12.patch
Signed-off-by: Arnaldo Carvalho de Melo
18 Dec, 2016
1 commit
-
Pull kbuild updates from Michal Marek:
- prototypes for x86 asm-exported symbols (Adam Borowski) and a warning
about missing CRCs (Nick Piggin)- asm-exports fix for LTO (Nicolas Pitre)
- thin archives improvements (Nick Piggin)
- linker script fix for CONFIG_LD_DEAD_CODE_DATA_ELIMINATION (Nick
Piggin)- genksyms support for __builtin_va_list keyword
- misc minor fixes
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
x86/kbuild: enable modversions for symbols exported from asm
kbuild: fix scripts/adjust_autoksyms.sh* for the no modules case
scripts/kallsyms: remove last remnants of --page-offset option
make use of make variable CURDIR instead of calling pwd
kbuild: cmd_export_list: tighten the sed script
kbuild: minor improvement for thin archives build
kbuild: modpost warn if export version crc is missing
kbuild: keep data tables through dead code elimination
kbuild: improve linker compatibility with lib-ksyms.o build
genksyms: Regenerate parser
kbuild/genksyms: handle va_list type
kbuild: thin archives for multi-y targets
kbuild: kallsyms allow 3-pass generation if symbols size has changed
16 Dec, 2016
2 commits
-
Commit 6c905981743 ("bpf: pre-allocate hash map elements") introduces
map_flags to bpf_attr for BPF_MAP_CREATE command. Expose this new
parameter in libbpf.By exposing it, users can access flags such as whether or not to
preallocate the map.Signed-off-by: Joe Stringer
Acked-by: Wang Nan
Cc: Alexei Starovoitov
Cc: Daniel Borkmann
Link: http://lkml.kernel.org/r/20161209024620.31660-4-joe@ovn.org
[ Added clarifying comment made by Wang Nan ]
Signed-off-by: Arnaldo Carvalho de Melo -
Fixes the following issue when building without access to 'u32' type:
./tools/lib/bpf/bpf.h:27:23: error: unknown type name ‘u32’
Signed-off-by: Joe Stringer
Acked-by: Wang Nan
Cc: Alexei Starovoitov
Cc: Daniel Borkmann
Link: http://lkml.kernel.org/r/20161209024620.31660-3-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo
11 Dec, 2016
1 commit
-
make already provides the current working directory in a variable, so make
use of it instead of forking a shell. Also replace usage of PWD by
CURDIR. PWD is provided by most shells, but not all, so this makes the
build system more robust.Signed-off-by: Uwe Kleine-König
Signed-off-by: Michal Marek
29 Nov, 2016
3 commits
-
Add a new API to libbpf, caller is able to get bpf_map through the
offset of bpf_map_def to 'maps' section.The API will be used to help jitted perf hook code find fd of a map.
Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
Cc: He Kuang
Cc: Jiri Olsa
Cc: Joe Stringer
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161126070354.141764-4-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo -
Similar to other classes defined in libbpf.h (map and program), allow
'object' class has its own private data.Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
Cc: He Kuang
Cc: Joe Stringer
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161126070354.141764-3-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo -
Add more BPF map operations to libbpf. Also add bpf_obj_{pin,get}(). They
can be used on not only BPF maps but also BPF programs.Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
Cc: He Kuang
Cc: Joe Stringer
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161126070354.141764-2-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo
25 Nov, 2016
1 commit
-
It is not correct to assimilate the elf data of the maps section to an
array of map definition. In fact the sizes differ. The offset provided
in the symbol section has to be used instead.This patch fixes a bug causing a elf with two maps not to load
correctly.Wang Nan added:
This patch requires a name for each BPF map, so array of BPF maps is not
allowed. This restriction is reasonable, because kernel verifier forbid
indexing BPF map from such array unless the index is a fixed value, but
if the index is fixed why not merging it into name?For example:
Program like this:
...
unsigned long cpu = get_smp_processor_id();
int *pval = map_lookup_elem(&map_array[cpu], &key);
...Generates bytecode like this:
0: (b7) r1 = 0
1: (63) *(u32 *)(r10 -4) = r1
2: (b7) r1 = 680997
3: (63) *(u32 *)(r10 -8) = r1
4: (85) call 8
5: (67) r0 <
Cc: Alexei Starovoitov
Cc: He Kuang
Cc: Wang Nan
[ Merge bpf_object__init_maps_name into bpf_object__init_maps.
Fix segfault for buggy BPF script Validate obj->maps ]
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161115040617.69788-5-wangnan0@huawei.com
Signed-off-by: Wang Nan
Signed-off-by: Arnaldo Carvalho de Melo
23 Nov, 2016
2 commits
-
Add a way to retrieve the preempt count as well as the latency flags from a
pevent_record.int pevent_data_preempt_count(pevent, record);
returns the preempt count of a record.
int pevent_data_flags(pevent, record);
returns the latency flags for a record.
Signed-off-by: Steven Rostedt
Acked-by: Namhyung Kim
Cc: Andrew Morton
Cc: Jiri Olsa
Link: http://lkml.kernel.org/r/20161122113158.03a010a8@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo -
Instead of using 1000000, use the define in time64.h instead.
Also remove the the duplicate defines for NSECS_PER_SEC.
Signed-off-by: Steven Rostedt
Acked-by: Namhyung Kim
Cc: Andrew Morton
Cc: Jiri Olsa
Link: http://lkml.kernel.org/r/20161121114149.67111981@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo
25 Oct, 2016
1 commit
-
Sometimes subcommand have common options and it can only handled in the
upper level command unless it duplicates the options.This patch adds a parent field and fallback to the parent if the given
argument was not found in the current options.Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: Andi Kleen
Cc: David Ahern
Cc: Josh Poimboeuf
Cc: Peter Zijlstra
Cc: Wang Nan
Link: http://lkml.kernel.org/r/20161024030003.28534-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
24 Oct, 2016
5 commits
-
Adding for_each_clear_bit macro plus all its the necessary backbone
functions. Taken from related kernel code. It will be used in following
patch.Signed-off-by: Jiri Olsa
Cc: Adrian Hunter
Cc: David Ahern
Cc: Namhyung Kim
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-cayv2zbqi0nlmg5sjjxs1775@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Adding version support for libtraceevent.so object.
Using the existing EVENT_PARSE_VERSION variable to construct
the .so object version string, which now consists of:$(EP_VERSION).$(EP_PATCHLEVEL).$(EP_EXTRAVERSION)
Looks like it was created for this purpose anyway.
The build will now produce following traeceevent libraries:
$ ll libtraceevent*
libtraceevent.a
libtraceevent.so -> libtraceevent.so.1.1.0
libtraceevent.so.1 -> libtraceevent.so.1.1.0
libtraceevent.so.1.1.0Also the install target will carry them:
$ make DESTDIR=/tmp/krava prefix=/usr install
INSTALL trace_plugins
INSTALL libtraceevent.a
INSTALL libtraceevent.so.1.1.0$ find /tmp/krava/ | xargs ls -l
...
/tmp/krava/usr/lib64:
total 572
libtraceevent.a
libtraceevent.so -> libtraceevent.so.1.1.0
libtraceevent.so.1 -> libtraceevent.so.1.1.0
libtraceevent.so.1.1.0
...Signed-off-by: Jiri Olsa
Cc: Namhyung Kim
Cc: Steven Rostedt
Link: http://lkml.kernel.org/n/tip-v64z62fh0dwt0ueie5usrnac@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
To ease up following patch.
Signed-off-by: Jiri Olsa
Cc: Namhyung Kim
Cc: Steven Rostedt
Link: http://lkml.kernel.org/n/tip-zpv5gd8y7clwrhh6dq03ucd5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Decompose the do_install function to ease up
the following patch a little.Signed-off-by: Jiri Olsa
Cc: Namhyung Kim
Cc: Steven Rostedt
Link: http://lkml.kernel.org/n/tip-zzs19yx8seyors532vuer37w@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Adding install_headers target to install all headers
under 'include/traceevent' path, like:$ make DESTDIR=/tmp/krava prefix=/usr install_headers
$ find /tmp/krava/ -type f
/tmp/krava/usr/include/traceevent/kbuffer.h
/tmp/krava/usr/include/traceevent/event-utils.h
/tmp/krava/usr/include/traceevent/event-parse.hSigned-off-by: Jiri Olsa
Cc: Namhyung Kim
Cc: Steven Rostedt
Link: http://lkml.kernel.org/n/tip-if70lj3zhdc3csdqm5webjvc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
05 Oct, 2016
1 commit
-
When it's called with an offset less than or equal to the first event,
it'll return a garbage value since the data is not initialized.Signed-off-by: Namhyung Kim
Acked-by: Steven Rostedt
Cc: Jiri Olsa
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20161001101700.29146-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
04 Oct, 2016
1 commit
-
Automatically adapt the now wider and word wrapped perf list output to
wider terminals. This requires querying the terminal before the auto
pager takes over, and exporting this information from the pager
subsystem.Signed-off-by: Andi Kleen
Signed-off-by: Sukadev Bhattiprolu
Acked-by: Ingo Molnar
Acked-by: Jiri Olsa
Acked-by: Namhyung Kim
Tested-by: Arnaldo Carvalho de Melo
Cc: Madhavan Srinivasan
Cc: Peter Zijlstra
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/1473978296-20712-8-git-send-email-sukadev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo
08 Sep, 2016
1 commit
-
Detect hugetlbfs. hugetlbfs__mountpoint() will be used during recording
to help identifying hugetlb mmaps: which should be recognized as anon
mapping.Signed-off-by: Wang Nan
Reviewed-by: Nilay Vaish
Cc: He Kuang
Cc: Hou Pengyang
Cc: Zefan Li
Link: http://lkml.kernel.org/r/1473137909-142064-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo
04 Aug, 2016
1 commit
-
…ernel/git/acme/linux into perf/urgent
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
New features:
- Add --sample-cpu to 'perf record', to explicitely ask for sampling
the CPU (Jiri Olsa)Fixes:
- Fix processing of multi byte chunks in objdump output, fixing
disassemble processing for annotation on at least ARM64 (Jan Stancek)- Use SyS_epoll_wait in a BPF 'perf test' entry instead of sys_epoll_wait, that
is not present in the DWARF info in vmlinux files (Arnaldo Carvalho de Melo)- Add -wno-shadow when processing files using perl headers, fixing
the build on Fedora Rawhide and Arch Linux (Namhyung Kim)Infrastructure changes:
- Annotate prep work to better catch and report errors related to
using objdump to disassemble DSOs (Arnaldo Carvalho de Melo)- Add 'alloc', 'scnprintf' and 'and' methods for bitmap processing (Jiri Olsa)
- Add nested output resorting callback in hists processing (Jiri Olsa)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
03 Aug, 2016
2 commits
-
Add support to perform logical and on bitmaps. Code taken from kernel's
include/linux/bitmap.h.Signed-off-by: Jiri Olsa
Cc: David Ahern
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1470074555-24889-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Add support to print bitmap list. Code mostly taken from kernel's
bitmap_list_string.Signed-off-by: Jiri Olsa
Cc: David Ahern
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1470074555-24889-3-git-send-email-jolsa@kernel.org
[ s/bitmap_snprintf/bitmap_scnprintf/g as it is a scnprintf wrapper, having the same semantics wrt return value ]
Signed-off-by: Arnaldo Carvalho de Melo
02 Aug, 2016
1 commit
-
Signed-off-by: Namhyung Kim
Cc: David Ahern
Cc: Jiri Olsa
Cc: Peter Zijlstra
Cc: Steven Rostedt
Link: http://lkml.kernel.org/r/20160802050148.3413-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
28 Jul, 2016
1 commit
-
Because it uses that function, which would lead every tool using it
to need to link against tools/lib/str_error_r.o.This fixes building tools/vm/, that links with libapi.
Reported-by: Arjan van de Ven
Reported-by: Randy Dunlap
Cc: Adrian Hunter
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Wang Nan
Fixes: b31e3e3316a7 ("tools lib api fs: Use str_error_r()")
Link: http://lkml.kernel.org/n/tip-aedt3qzibhnhaov2j4caqi61@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
26 Jul, 2016
1 commit
-
New LLVM will issue newly assigned EM_BPF machine code. The new code
will be propagated to glibc and libelf.This patch introduces the new machine code to libbpf.
Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1468821668-60088-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo
16 Jul, 2016
2 commits
-
Add a 'ptr' field to fdarray->priv array.
This feature will be used by following commits, which introduce
muiltiple 'struct perf_mmap' arrays for different types of mapping.Because of this, during fdarray__filter(), a simple 'idx' is not enough.
Add a pointer cookie that allows to directly associate a 'struct
perf_mmap' pointer to an fdarray entry.Signed-off-by: Wang Nan
Acked-by: Jiri Olsa
Cc: Adrian Hunter
Cc: David Ahern
Cc: He Kuang
Cc: Masami Hiramatsu
Cc: Namhyung Kim
Cc: Nilay Vaish
Cc: Peter Zijlstra
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1468485287-33422-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo -
By using 0 for base, the strtoull() detects the base automatically (see
'man strtoull').ATM we have just one user of this function, the cpu__get_max_freq
function reading the "cpuinfo_max_freq" sysfs file. It should not get
affected by this change.Committer note:
This change seems motivated by this discussion:
"[PATCH] [RFC V1]s390/perf: fix 'start' address of module's map"
http://lkml.kernel.org/r/20160711120155.GA29929@kravaI.e. this patches paves the way for filename__read_ull() to be used in a
S/390 related fix.Signed-off-by: Jiri Olsa
Cc: David Ahern
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Songshan Gong
Link: http://lkml.kernel.org/r/1468567797-27564-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
14 Jul, 2016
3 commits
-
We need to include netinet/in.h to get the in6_addr struct definition, needed to
build it on the Android NDK:In file included from event-parse.c:36:0:
/home/acme/android/android-ndk-r12/platforms/android-24/arch-arm/usr/include/netinet/ip6.h:82:18: error: field 'ip6_src' has incomplete type
struct in6_addr ip6_src; /* source address */And it is the canonical way of getting IPv6 definitions, as described,
for instance, in Linux's 'man ipv6'Doing that uncovers another problem: this source file uses PRIu64 but
doesn't include it, depending on it being included by chance via the now
replaced header (netinet/ip6.h), fix it.Cc: Adrian Hunter
Cc: Chris Phlipot
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Steven Rostedt
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-tilr31n3yaba1whsd47qlwa3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Now libbpf support tracepoint program type. Report meaningful error when kernel
version is less than 4.7.Signed-off-by: Wang Nan
Cc: Alexei Starovoitov
Cc: Jiri Olsa
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1468406646-21642-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo -
Add 4 new APIs to adjust and query the type of a BPF program.
Load program according to type set by caller. Default is set to
BPF_PROG_TYPE_KPROBE.Signed-off-by: Wang Nan
Cc: Alexei Starovoitov
Cc: Jiri Olsa
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1468406646-21642-2-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo
13 Jul, 2016
7 commits
-
Add a 'CPU' special field to allow the filter in trace-cmd report to
filter on the task's CPU.By adding a special field 'CPU' (all caps) the user can now filter out
tasks based on which CPU they are on. This is useful when filtering out
(or in) a bunch of threads.-F 'CPU == 0'
Signed-off-by: Steven Rostedt
Cc: Andrew Morton
Cc: Namhyung Kim
Link: http://lkml.kernel.org/r/20160712093306.5b058103@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo -
To allow the build to complete on older systems, where those files are
either not uptodate, lacking some recent additions or not present at
all.And check if the copy drifts from the kernel, as in this synthetic test:
BUILD: Doing 'make -j4' parallel build
Warning: tools/include/linux/bpf.h differs from kernel
Warning: tools/include/linux/bpf_common.h differs from kernelCc: Adrian Hunter
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-5plvi2gq4x469dcyybiu226q@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
To make it portable to non-glibc systems, that follow the XSI variant
instead of the GNU specific one that gets in place when _GNU_SOURCE is
defined.Cc: Adrian Hunter
Cc: David Ahern
Cc: Jiri Olsa
Cc: Josh Poimboeuf
Cc: Namhyung Kim
Cc: Steven Rostedt
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-bozcszy93tpgw9ad6qm3dhpx@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
To make it portable to non-glibc systems, that follow the XSI variant
instead of the GNU specific one that gets in place when _GNU_SOURCE is
defined.Cc: Adrian Hunter
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Steven Rostedt
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-mixgnh3iyajuqogn2opsocdy@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
To make it portable to non-glibc systems, that follow the XSI variant
instead of the GNU specific one that gets in place when _GNU_SOURCE is
defined.Cc: Adrian Hunter
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Steven Rostedt
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-c1gn8x978qfop65m510wy43o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
They were in tools/include/linux/kernel.h, requiring that it in turn
included stdio.h, which is way too heavy.Cc: Adrian Hunter
Cc: David Ahern
Cc: Jiri Olsa
Cc: Josh Poimboeuf
Cc: Namhyung Kim
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-855h8olnkot9v0dajuee1lo3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
The tools so far have been using the strerror_r() GNU variant, that
returns a string, be it the buffer passed or something else.But that, besides being tricky in cases where we expect that the
function using strerror_r() returns the error formatted in a provided
buffer (we have to check if it returned something else and copy that
instead), breaks the build on systems not using glibc, like Alpine
Linux, where musl libc is used.So, introduce yet another wrapper, str_error_r(), that has the GNU
interface, but uses the portable XSI variant of strerror_r(), so that
users rest asured that the provided buffer is used and it is what is
returned.Cc: Adrian Hunter
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-d4t42fnf48ytlk8rjxs822tf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
05 Jul, 2016
1 commit
-
this enables the workaround for compilers that generate warnings when
compiling libsubcmd.Signed-off-by: Chris Phlipot
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1467349955-1135-3-git-send-email-cphlipot0@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo
