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Linux 3.4 compat, d_make_root() replaces d_alloc_root()

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torvalds/linux@adc0e91ab1 introduced
introduced d_make_root() as a replacement for d_alloc_root(). Further
commits appear to have removed d_alloc_root() from the Linux source
tree. This causes the following failure:

  error: implicit declaration of function 'd_alloc_root'
  [-Werror=implicit-function-declaration]

To correct this we update the code to use the current d_make_root()
interface for readability.  Then we introduce an autotools check
to determine if d_make_root() is available.  If it isn't then we
define some compatibility logic which used the older d_alloc_root()
interface.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #776
This commit is contained in:
Richard Yao
2012-06-06 17:08:00 +00:00
committed by Brian Behlendorf
parent ab85f8455b
commit 6a0936babc
61 changed files with 182 additions and 1 deletions
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configure
Vendored
+106
View File
@@ -15945,6 +15945,59 @@ fi
{ $as_echo "$as_me:$LINENO: checking whether symbol d_make_root is exported" >&5
$as_echo_n "checking whether symbol d_make_root is exported... " >&6; }
grep -q -E '[[:space:]]d_make_root[[:space:]]' \
$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
rc=$?
if test $rc -ne 0; then
export=0
for file in fs/dcache.c; do
grep -q -E "EXPORT_SYMBOL.*(d_make_root)" "$LINUX/$file" 2>/dev/null
rc=$?
if test $rc -eq 0; then
export=1
break;
fi
done
if test $export -eq 0; then
{ $as_echo "$as_me:$LINENO: result: no" >&5
$as_echo "no" >&6; }
else
{ $as_echo "$as_me:$LINENO: result: yes" >&5
$as_echo "yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_D_MAKE_ROOT 1
_ACEOF
fi
else
{ $as_echo "$as_me:$LINENO: result: yes" >&5
$as_echo "yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_D_MAKE_ROOT 1
_ACEOF
fi
{ $as_echo "$as_me:$LINENO: checking whether symbol d_obtain_alias is exported" >&5
$as_echo_n "checking whether symbol d_obtain_alias is exported... " >&6; }
grep -q -E '[[:space:]]d_obtain_alias[[:space:]]' \
@@ -22040,6 +22093,59 @@ fi
{ $as_echo "$as_me:$LINENO: checking whether symbol d_make_root is exported" >&5
$as_echo_n "checking whether symbol d_make_root is exported... " >&6; }
grep -q -E '[[:space:]]d_make_root[[:space:]]' \
$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
rc=$?
if test $rc -ne 0; then
export=0
for file in fs/dcache.c; do
grep -q -E "EXPORT_SYMBOL.*(d_make_root)" "$LINUX/$file" 2>/dev/null
rc=$?
if test $rc -eq 0; then
export=1
break;
fi
done
if test $export -eq 0; then
{ $as_echo "$as_me:$LINENO: result: no" >&5
$as_echo "no" >&6; }
else
{ $as_echo "$as_me:$LINENO: result: yes" >&5
$as_echo "yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_D_MAKE_ROOT 1
_ACEOF
fi
else
{ $as_echo "$as_me:$LINENO: result: yes" >&5
$as_echo "yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_D_MAKE_ROOT 1
_ACEOF
fi
{ $as_echo "$as_me:$LINENO: checking whether symbol d_obtain_alias is exported" >&5
$as_echo_n "checking whether symbol d_obtain_alias is exported... " >&6; }
grep -q -E '[[:space:]]d_obtain_alias[[:space:]]' \