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scst/scripts/kernel-functions
Bart Van Assche eb8d5f0825 Undo the changes from r8916 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.4.x@8917 d57e44dd-8a1f-0410-8b47-8ef2f437770f
2020-05-15 15:46:47 +00:00

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#!/bin/bash
# Shell functions for parsing the Linux kernel version and for downloading
# from kernel.org.
kernel_mirror="http://cdn.kernel.org/pub/linux/kernel"
kernel_downloads="$HOME/software/downloads"
kernel_tree="$HOME/software/linux-kernel"
# Whether or not kernel version $1 is lower than or equal kernel version $2.
function kernel_version_le {
awk -v "v1=$1" -v "v2=$2" 'BEGIN { n1 = split(v1, v1a, "."); n2 = split(v2, v2a, "."); for (i=1;;i++) { e1 = i <= n1 ? v1a[i] : 0; e2 = i <= n2 ? v2a[i] : 0; if (e1 < e2 || i > n1 && i > n2) exit 0; if (e1 > e2) exit 1; }}'
}
function kernel_version_lt {
[ "$1" != "$2" ] && kernel_version_le "$1" "$2"
}
# Kernel version number.
function kernel_version {
if [ "${1#2.}" != "$1" ]; then
echo "$1" | sed -n 's/^\([0-9]*\.[0-9]*\.[0-9]*\).*$/\1/p'
else
echo "$1" | sed -n 's/^\([0-9]*\.[0-9]*\).*$/\1/p'
fi
}
# Last component of the kernel version, or the empty string if $1 does
# not contain a patchlevel.
function patchlevel {
if [ "${1#2.}" != "$1" ]; then
echo "$1" | sed -n 's/^\([0-9]*\.[0-9]*\.[0-9]*\)[.-]\(.*\)$/\2/p'
else
echo "$1" | sed -n 's/^\([0-9]*\.[0-9]*\)[.-]\(.*\)$/\2/p'
fi
}
# Download the file from URL $1 and save it in the current directory.
function download_file {
if [ ! -e "$(basename "$1")" ]; then
if [ "${quiet_download}" = "false" ]; then
{ wget -q -nc -O- "$1" 2>/dev/null | grep -q .; } \
&& echo "Downloading $1 ..."
fi
wget -q -nc "$1"
fi
[ -e "$(basename "$1")" ]
}
# Make sure the kernel tarball and patch file are present in directory
# ${kernel_downloads}. Download any missing files from ${kernel_mirror}.
function download_kernel {
local kver="$(kernel_version "$1")"
local plevel="$(patchlevel "$1")"
local series="$1"
case "${series:0:2}" in
[12].*) series="${series:0:3}";;
*) series="${series/.*/}.x";;
esac
mkdir -p "${kernel_downloads}" || return $?
test -w "${kernel_downloads}" || return $?
(
cd "${kernel_downloads}" || return $?
if [ "$plevel" = "" ] || [ "$plevel" = "0" ] ||
download_file "${kernel_mirror}/v$series/patch-$1.xz"
then
download_file "${kernel_mirror}/v$series/linux-${kver}.tar.xz" ||
return $?
else
download_file "${kernel_mirror}/v$series/linux-$1.tar.xz" ||
return $?
fi
)
}
function extract_kernel_archive {
local kver="$(kernel_version "$1")"
local plevel="$(patchlevel "$1")"
local series="$1"
if [ -e "${kernel_downloads}/linux-$1.tar.xz" ]; then
xz -cd "${kernel_downloads}/linux-$1.tar.xz" | tar xf -
elif [ -e "${kernel_downloads}/linux-$kver.tar.xz" ]; then
xz -cd "${kernel_downloads}/linux-$kver.tar.xz" | tar xf - &&
mv "linux-$kver" "linux-$1"
elif [ -e "${kernel_downloads}/linux-$1.tar.bz2" ]; then
tar xjf "${kernel_downloads}/linux-$1.tar.bz2"
elif [ -e "${kernel_downloads}/linux-$kver.tar.bz2" ]; then
tar xjf "${kernel_downloads}/linux-$kver.tar.bz2" &&
mv "linux-$kver" "linux-$1"
else
return 1
fi
}
# Create a linux-$1 tree in the current directory, where $1 is a kernel
# version number with either three or four components.
function extract_kernel_tree {
local kver="$(kernel_version "$1")"
local plevel="$(patchlevel "$1")"
local tmpdir=kernel-tree-tmp-$$
rm -rf "linux-$1" "${tmpdir}"
mkdir "${tmpdir}" || return $?
(
cd "${tmpdir}" || return $?
if [ "$plevel" != "" ] && [ "$plevel" != "0" ] &&
[ -e "${kernel_downloads}/patch-$1.xz" ]; then
extract_kernel_archive "$kver" || return $?
mv "linux-$kver" "linux-$1"
( cd "linux-$1" && xz -cd "${kernel_downloads}/patch-$1.xz" \
| patch -p1 -f -s; ) \
|| return $?
else
extract_kernel_archive "$1" ||
{ extract_kernel_archive "$kver" && mv "linux-$kver" "linux-$1"; } ||
return $?
fi
mv "linux-$1" ".." || return $?
cd "../linux-$1" || return $?
)
rmdir "${tmpdir}"
}
# Patch a kernel tree where $1 is the kernel version.
function patch_kernel {
if [ "$1" = "2.6.29" ] || [ "$1" = "2.6.29.1" ] || [ "$1" = "2.6.29.2" ] || [ "$1" = "2.6.29.3" ]
then
patch -f -s -p1 <<'EOF'
Make sure that branch profiling does not trigger sparse warnings.
See also http://bugzilla.kernel.org/show_bug.cgi?id=12925
---
See also http://lkml.org/lkml/2009/4/5/120
--- orig/linux-2.6.29/include/linux/compiler.h 2009-03-23 19:12:14.000000000 -0400
+++ linux-2.6.29/include/linux/compiler.h 2009-03-24 08:46:46.000000000 -0400
@@ -75,7 +75,8 @@ struct ftrace_branch_data {
* Note: DISABLE_BRANCH_PROFILING can be used by special lowlevel code
* to disable branch tracing on a per file basis.
*/
-#if defined(CONFIG_TRACE_BRANCH_PROFILING) && !defined(DISABLE_BRANCH_PROFILING)
+#if defined(CONFIG_TRACE_BRANCH_PROFILING) \
+ && !defined(DISABLE_BRANCH_PROFILING) && !defined(__CHECKER__)
void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
#define likely_notrace(x) __builtin_expect(!!(x), 1)
EOF
fi
if [ "${1#2.6.31}" != "$1" ]
then
patch -f -s -p1 <<'EOF'
Checking a 2.6.31.1 kernel configured with allyesconfig/allmodconfig
with sparse (make C=2) triggers a sparse warning on code that uses the
kmemcheck_annotate_bitfield() macro. An example of such a warning:
include/net/inet_sock.h:208:17: warning: do-while statement is not a compound statement
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Vegard Nossum <vegardno@ifi.uio.no>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
See also http://lkml.org/lkml/2009/9/26/51
--- linux-2.6.31.1/include/linux/kmemcheck-orig.h 2009-09-26 13:53:44.000000000 +0200
+++ linux-2.6.31.1/include/linux/kmemcheck.h 2009-09-26 13:53:56.000000000 +0200
@@ -137,13 +137,13 @@ static inline void kmemcheck_mark_initia
int name##_end[0];
#define kmemcheck_annotate_bitfield(ptr, name) \
- do if (ptr) { \
+ do { if (ptr) { \
int _n = (long) &((ptr)->name##_end) \
- (long) &((ptr)->name##_begin); \
BUILD_BUG_ON(_n < 0); \
\
kmemcheck_mark_initialized(&((ptr)->name##_begin), _n); \
- } while (0)
+ } } while (0)
#define kmemcheck_annotate_variable(var) \
do { \
EOF
fi
if [ "${1#2.6.32}" != "$1" ] || [ "${1#2.6.33}" != "$1" ]
then
patch -f -s -p1 <<'EOF'
Get rid of sparse errors on sk_buff.protocol.
--- linux/include/linux/skbuff-orig.h 2010-12-07 13:40:51.000000000 -0500
+++ linux/include/linux/skbuff.h 2010-12-07 13:41:05.000000000 -0500
@@ -349,8 +349,8 @@ struct sk_buff {
ipvs_property:1,
peeked:1,
nf_trace:1;
- __be16 protocol:16;
kmemcheck_bitfield_end(flags1);
+ __be16 protocol;
void (*destructor)(struct sk_buff *skb);
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
EOF
fi
if [ "${1#3.13}" != "$1" ]; then
if [ "$1" = "3.13" ] || [ "${1#3.13.}" -lt 6 ]; then
patch -f -s -p1 <<'EOF'
From 7b4ec8dd7d4ac467e9eee4d49f2c9574d773efbb Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Thu, 16 Jan 2014 10:18:48 +1030
Subject: [PATCH] export: declare ksymtab symbols
sparse complains about any __ksymtab symbols with the following:
warning: symbol '__ksymtab_...' was not declared. Should it be static?
due to Andi's patch making it non-static.
Mollify sparse by declaring the symbol extern, otherwise we get
drowned in sparse warnings for anything that uses EXPORT_SYMBOL
in the sources, making it easy to miss real warnings.
Fixes: e0f244c63fc9 ("asmlinkage, module: Make ksymtab [...] __visible")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
include/linux/export.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/export.h b/include/linux/export.h
index 3f2793d..96e45ea 100644
--- a/include/linux/export.h
+++ b/include/linux/export.h
@@ -59,6 +59,7 @@ extern struct module __this_module;
static const char __kstrtab_##sym[] \
__attribute__((section("__ksymtab_strings"), aligned(1))) \
= VMLINUX_SYMBOL_STR(sym); \
+ extern const struct kernel_symbol __ksymtab_##sym; \
__visible const struct kernel_symbol __ksymtab_##sym \
__used \
__attribute__((section("___ksymtab" sec "+" #sym), unused)) \
EOF
fi
fi
if [ "${1#4.15}" != "$1" ]; then
patch -f -s -p1 <<'EOF'
From ad343a98e74e85aa91d844310e797f96fee6983b Mon Sep 17 00:00:00 2001
From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Date: Tue, 6 Feb 2018 15:37:52 -0800
Subject: [PATCH] tools/lib/subcmd/pager.c: do not alias select() params
Use a separate fd set for select()-s exception fds param to fix the
following gcc warning:
pager.c:36:12: error: passing argument 2 to restrict-qualified parameter aliases with argument 4 [-Werror=restrict]
select(1, &in, NULL, &in, NULL);
^~~ ~~~
Link: http://lkml.kernel.org/r/20180101105626.7168-1-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
tools/lib/subcmd/pager.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tools/lib/subcmd/pager.c b/tools/lib/subcmd/pager.c
index 5ba754d17952..9997a8805a82 100644
--- a/tools/lib/subcmd/pager.c
+++ b/tools/lib/subcmd/pager.c
@@ -30,10 +30,13 @@ static void pager_preexec(void)
* have real input
*/
fd_set in;
+ fd_set exception;
FD_ZERO(&in);
+ FD_ZERO(&exception);
FD_SET(0, &in);
- select(1, &in, NULL, &in, NULL);
+ FD_SET(0, &exception);
+ select(1, &in, NULL, &exception, NULL);
setenv("LESS", "FRSX", 0);
}
EOF
patch -f -s -p1 <<'EOF'
From 854e55ad289ef8888e7991f0ada85d5846f5afb9 Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Thu, 15 Mar 2018 22:11:54 -0500
Subject: [PATCH] objtool, perf: Fix GCC 8 -Wrestrict error
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Starting with recent GCC 8 builds, objtool and perf fail to build with
the following error:
../str_error_r.c: In function 'str_error_r':
../str_error_r.c:25:3: error: passing argument 1 to restrict-qualified parameter aliases with argument 5 [-Werror=restrict]
snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, %p, %zd)=%d", errnum, buf, buflen, err);
The code seems harmless, but there's probably no benefit in printing the
'buf' pointer in this situation anyway, so just remove it to make GCC
happy.
Reported-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20180316031154.juk2uncs7baffctp@treble
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/lib/str_error_r.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/str_error_r.c b/tools/lib/str_error_r.c
index d6d65537b0d9..6aad8308a0ac 100644
--- a/tools/lib/str_error_r.c
+++ b/tools/lib/str_error_r.c
@@ -22,6 +22,6 @@ char *str_error_r(int errnum, char *buf, size_t buflen)
{
int err = strerror_r(errnum, buf, buflen);
if (err)
- snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, %p, %zd)=%d", errnum, buf, buflen, err);
+ snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, [buf], %zd)=%d", errnum, buflen, err);
return buf;
}
EOF
fi
case "$1" in
2.6.3[6-9]*|3.[0-9]|3.[0-9].*|3.1[01345]|3.1[01345].*|3.1[789]|3.1[789].*|4.[023567]|4.[023567].*)
patch -p1 <<'EOF'
From c6a385539175ebc603da53aafb7753d39089f32e Mon Sep 17 00:00:00 2001
From: Borislav Petkov <bp@suse.de>
Date: Mon, 14 Nov 2016 19:41:31 +0100
Subject: [PATCH] kbuild: Steal gcc's pie from the very beginning
So Sebastian turned off the PIE for kernel builds but that was too late
- Kbuild.include already uses KBUILD_CFLAGS and trying to disable gcc
options with, say cc-disable-warning, fails:
gcc -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs
...
-Wno-sign-compare -fno-asynchronous-unwind-tables -Wframe-address -c -x c /dev/null -o .31392.tmp
/dev/null:1:0: error: code model kernel does not support PIC mode
because that returns an error and we can't disable the warning. For
example in this case:
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
which leads to gcc issuing all those warnings again.
So let's turn off PIE/PIC at the earliest possible moment, when we
declare KBUILD_CFLAGS so that cc-disable-warning picks it up too.
Also, we need the $(call cc-option ...) because -fno-PIE is supported
since gcc v3.4 and our lowest supported gcc version is 3.2 right now.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Michal Marek <mmarek@suse.com>
[ bvanassche: moved -fno-PIE to start of KBUILD_CFLAGS ]
---
Makefile | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/Makefile b/Makefile
index 0ed6ce300543..c324b43712f0 100644
--- a/Makefile
+++ b/Makefile
@@ -378,7 +378,8 @@ LINUXINCLUDE := \
KBUILD_CPPFLAGS := -D__KERNEL__
-KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
+KBUILD_CFLAGS := $(call cc-option,-fno-PIE) \
+ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common \
-Werror-implicit-function-declaration \
-Wno-format-security \
@@ -387,7 +388,7 @@ KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
-KBUILD_AFLAGS := -D__ASSEMBLY__
+KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
KBUILD_AFLAGS_MODULE := -DMODULE
KBUILD_CFLAGS_MODULE := -DMODULE
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
EOF
;;
2.6.3[1-5]*)
patch -p1 <<'EOF'
diff --git a/Makefile b/Makefile
index 141da26fda4b..343ec388ae2e 100644
--- a/Makefile
+++ b/Makefile
@@ -349,12 +349,13 @@ LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
KBUILD_CPPFLAGS := -D__KERNEL__
-KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
+KBUILD_CFLAGS := $(call cc-option,-fno-PIE) \
+ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common \
-Werror-implicit-function-declaration \
-Wno-format-security \
-fno-delete-null-pointer-checks
-KBUILD_AFLAGS := -D__ASSEMBLY__
+KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
EOF
;;
esac
# Use sed to patch the ____ilog2_NaN() prototype.
sed -i 's/__attribute__((const, noreturn))/__attribute__((noreturn))/' \
include/linux/log2.h tools/include/linux/log2.h 2>/dev/null
# After patch-v4.14.1[12] has been applied, the execute bit has to be
# set for sync-check.sh since patch can't do that.
for f in "tools/objtool/sync-check.sh"; do
if [ -e "$f" ]; then
chmod a+x "$f"
fi
done
}
function download_and_extract_kernel_tree {
if [ -e "${kernel_tree}" ]; then
rm -rf "linux-$1"
mkdir "linux-$1"
(
cd "${kernel_tree}" &&
{
{ git tag -l "v$1" | grep -q '^v'; } ||
{
echo "Could not find tag v$1;" \
"updating git repository" 1>&2
git fetch origin
git fetch stable
}
} &&
git archive "v$1"
) | tar -C "linux-$1" -xf-
else
download_kernel "$1" && extract_kernel_tree "$1"
fi &&
(cd "linux-$1" && patch_kernel "$1")
}
# For shellcheck
if false; then
quiet_download=true
fi
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