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authorGvozden Neskovic <[email protected]>2016-07-26 21:08:51 +0200
committerBrian Behlendorf <[email protected]>2016-08-09 14:40:35 -0700
commit689f093ebcfa0d57895495050d2b470ed2bef52e (patch)
treebad826364ffda411af64beae3720389173188568
parentafb6c031e87d511abd9f0f4ec629ab1972490269 (diff)
Build user-space with different gcc optimization levels
This fix resolves warnings reported during compiling of user-space libraries with different gcc optimization levels. Tested with gcc versions: 4.9.2 (Debian), and 6.1.1 (Fedora). The patch enables use of following opt levels: O0, O1, O2, O3, Og, Os, Ofast. List of warnings: [GCC 4.9.2 -Os] libzfs_sendrecv.c:3726:26: error: 'clp' may be used uninitialized in this function [-Werror=maybe-uninitialized] [GCC 4.9.2 -Og] fs_fletcher.c:323:26: error: 'idx' may be used uninitialized in this function [-Werror=maybe-uninitialized] dsl_dataset.c:1290:12: error: 'atp' may be used uninitialized in this function [-Werror=maybe-uninitialized] [GCC 4.9.2 -Ofast] u8_textprep.c:1310:9: error: 'tc[3ul]' may be used uninitialized in this function [-Werror=maybe-uninitialized] u8_textprep.c:177:23: error: 'u8t[0ul]' may be used uninitialized in this function [-Werror=maybe-uninitialized] dsl_dataset.c:2089:37: error: ‘hds’ may be used uninitialized in this function [-Werror=maybe-uninitialized] dsl_dataset.c:3216:2: error: ‘ds’ may be used uninitialized in this function [-Werror=maybe-uninitialized] dsl_dataset.c:1591:2: error: ‘ds’ may be used uninitialized in this function [-Werror=maybe-uninitialized] dsl_dataset.c:3341:2: error: ‘ds’ may be used uninitialized in this function [-Werror=maybe-uninitialized] vdev_raidz.c:1153:8: error: 'dcount[2]' may be used uninitialized in this function [-Werror=maybe-uninitialized] vdev_raidz.c:1167:17: error: 'dst[2]' may be used uninitialized in this function [-Werror=maybe-uninitialized] kernel.c:1005:2: error: ‘resid’ may be used uninitialized in this function [-Werror=maybe-uninitialized] libzfs_dataset.c:2826:8: error: ‘val’ may be used uninitialized in this function [-Werror=maybe-uninitialized] libzfs_dataset.c:3056:35: error: ‘val’ may be used uninitialized in this function [-Werror=maybe-uninitialized] libzfs_dataset.c:1584:13: error: ‘val’ may be used uninitialized in this function [-Werror=maybe-uninitialized] libzfs_dataset.c:3056:35: error: ‘val’ may be used uninitialized in this function [-Werror=maybe-uninitialized] libzfs_dataset.c:1792:66: error: ‘val’ may be used uninitialized in this function [-Werror=maybe-uninitialized] libzfs_dataset.c:3986:35: error: ‘val’ may be used uninitialized in this function [-Werror=maybe-uninitialized] [GCC 6.1.1] Resolved in PR #4907 Signed-off-by: Gvozden Neskovic <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #4937
-rw-r--r--lib/libzfs/libzfs_dataset.c2
-rw-r--r--lib/libzfs/libzfs_sendrecv.c4
-rw-r--r--lib/libzpool/kernel.c2
-rw-r--r--module/unicode/u8_textprep.c4
-rw-r--r--module/zcommon/zfs_fletcher.c2
-rw-r--r--module/zfs/dsl_dataset.c10
-rw-r--r--module/zfs/vdev_raidz.c4
7 files changed, 14 insertions, 14 deletions
diff --git a/lib/libzfs/libzfs_dataset.c b/lib/libzfs/libzfs_dataset.c
index 3ff96f0c6..794d35fbe 100644
--- a/lib/libzfs/libzfs_dataset.c
+++ b/lib/libzfs/libzfs_dataset.c
@@ -2625,7 +2625,7 @@ uint64_t
zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
{
char *source;
- uint64_t val;
+ uint64_t val = 0;
(void) get_numeric_property(zhp, prop, NULL, &source, &val);
diff --git a/lib/libzfs/libzfs_sendrecv.c b/lib/libzfs/libzfs_sendrecv.c
index bc8bd5f8a..6adcc7a54 100644
--- a/lib/libzfs/libzfs_sendrecv.c
+++ b/lib/libzfs/libzfs_sendrecv.c
@@ -3710,8 +3710,8 @@ zfs_receive(libzfs_handle_t *hdl, const char *tosnap, nvlist_t *props,
VERIFY(0 == close(cleanup_fd));
if (err == 0 && !flags->nomount && top_zfs) {
- zfs_handle_t *zhp;
- prop_changelist_t *clp;
+ zfs_handle_t *zhp = NULL;
+ prop_changelist_t *clp = NULL;
zhp = zfs_open(hdl, top_zfs, ZFS_TYPE_FILESYSTEM);
if (zhp != NULL) {
diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c
index a68911451..549dd4c5c 100644
--- a/lib/libzpool/kernel.c
+++ b/lib/libzpool/kernel.c
@@ -996,7 +996,7 @@ kobj_open_file(char *name)
int
kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off)
{
- ssize_t resid;
+ ssize_t resid = 0;
if (vn_rdwr(UIO_READ, (vnode_t *)file->_fd, buf, size, (offset_t)off,
UIO_SYSSPACE, 0, 0, 0, &resid) != 0)
diff --git a/module/unicode/u8_textprep.c b/module/unicode/u8_textprep.c
index 26cc39f3b..992f6b6b7 100644
--- a/module/unicode/u8_textprep.c
+++ b/module/unicode/u8_textprep.c
@@ -1060,7 +1060,7 @@ do_composition(size_t uv, uchar_t *s, uchar_t *comb_class, uchar_t *start,
uchar_t *disp, size_t last, uchar_t **os, uchar_t *oslast)
{
uchar_t t[U8_STREAM_SAFE_TEXT_MAX + 1];
- uchar_t tc[U8_MB_CUR_MAX];
+ uchar_t tc[U8_MB_CUR_MAX] = { '\0' };
uint8_t saved_marks[U8_MAX_CHARS_A_SEQ];
size_t saved_marks_count;
uchar_t *p;
@@ -1396,7 +1396,7 @@ collect_a_seq(size_t uv, uchar_t *u8s, uchar_t **source, uchar_t *slast,
uchar_t comb_class[U8_MAX_CHARS_A_SEQ];
uchar_t disp[U8_MAX_CHARS_A_SEQ];
uchar_t start[U8_MAX_CHARS_A_SEQ];
- uchar_t u8t[U8_MB_CUR_MAX];
+ uchar_t u8t[U8_MB_CUR_MAX] = { '\0' };
uchar_t uts[U8_STREAM_SAFE_TEXT_MAX + 1];
uchar_t tc;
size_t last;
diff --git a/module/zcommon/zfs_fletcher.c b/module/zcommon/zfs_fletcher.c
index a3888a32b..f3eae6791 100644
--- a/module/zcommon/zfs_fletcher.c
+++ b/module/zcommon/zfs_fletcher.c
@@ -294,7 +294,7 @@ int
fletcher_4_impl_set(const char *val)
{
const fletcher_4_ops_t *ops;
- enum fletcher_selector idx;
+ enum fletcher_selector idx = FLETCHER_FASTEST;
size_t val_len;
unsigned i;
diff --git a/module/zfs/dsl_dataset.c b/module/zfs/dsl_dataset.c
index 1b2ac72b0..5d7847d46 100644
--- a/module/zfs/dsl_dataset.c
+++ b/module/zfs/dsl_dataset.c
@@ -1270,7 +1270,7 @@ dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx)
pair != NULL; pair = nvlist_next_nvpair(ddsa->ddsa_snaps, pair)) {
int error = 0;
dsl_dataset_t *ds;
- char *name, *atp;
+ char *name, *atp = NULL;
char dsname[ZFS_MAX_DATASET_NAME_LEN];
name = nvpair_name(pair);
@@ -1584,7 +1584,7 @@ dsl_dataset_snapshot_tmp_sync(void *arg, dmu_tx_t *tx)
{
dsl_dataset_snapshot_tmp_arg_t *ddsta = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
- dsl_dataset_t *ds;
+ dsl_dataset_t *ds = NULL;
VERIFY0(dsl_dataset_hold(dp, ddsta->ddsta_fsname, FTAG, &ds));
@@ -2081,7 +2081,7 @@ dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx)
{
dsl_dataset_rename_snapshot_arg_t *ddrsa = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
- dsl_dataset_t *hds;
+ dsl_dataset_t *hds = NULL;
VERIFY0(dsl_dataset_hold(dp, ddrsa->ddrsa_fsname, FTAG, &hds));
ddrsa->ddrsa_tx = tx;
@@ -3209,7 +3209,7 @@ dsl_dataset_set_refquota_sync(void *arg, dmu_tx_t *tx)
{
dsl_dataset_set_qr_arg_t *ddsqra = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
- dsl_dataset_t *ds;
+ dsl_dataset_t *ds = NULL;
uint64_t newval;
VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds));
@@ -3336,7 +3336,7 @@ dsl_dataset_set_refreservation_sync(void *arg, dmu_tx_t *tx)
{
dsl_dataset_set_qr_arg_t *ddsqra = arg;
dsl_pool_t *dp = dmu_tx_pool(tx);
- dsl_dataset_t *ds;
+ dsl_dataset_t *ds = NULL;
VERIFY0(dsl_dataset_hold(dp, ddsqra->ddsqra_name, FTAG, &ds));
dsl_dataset_set_refreservation_sync_impl(ds,
diff --git a/module/zfs/vdev_raidz.c b/module/zfs/vdev_raidz.c
index b67de0896..f5df2c7d8 100644
--- a/module/zfs/vdev_raidz.c
+++ b/module/zfs/vdev_raidz.c
@@ -1103,8 +1103,8 @@ vdev_raidz_matrix_reconstruct(raidz_map_t *rm, int n, int nmissing,
int i, j, x, cc, c;
uint8_t *src;
uint64_t ccount;
- uint8_t *dst[VDEV_RAIDZ_MAXPARITY];
- uint64_t dcount[VDEV_RAIDZ_MAXPARITY];
+ uint8_t *dst[VDEV_RAIDZ_MAXPARITY] = { NULL };
+ uint64_t dcount[VDEV_RAIDZ_MAXPARITY] = { 0 };
uint8_t log = 0;
uint8_t val;
int ll;