[alsa-devel] [PATCH 1/3][V2] lib: fix match_string() helper on -1 array size

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Alexandru Ardelean

28 May 2019 28 May '19

9:39 a.m.

The documentation the `_match_string()` helper mentions that `n` should be: * @n: number of strings in the array or -1 for NULL terminated arrays

The behavior of the function is different, in the sense that it exits on the first NULL element in the array, regardless of whether `n` is -1 or a positive number.

This patch changes the behavior, to exit the loop when a NULL element is found and n == -1. Essentially, this aligns the behavior with the doc-string.

There are currently many users of `match_string()`, and so, in order to go through them, the next patches in the series will focus on doing some cosmetic changes, which are aimed at grouping the users of `match_string()`.

Signed-off-by: Alexandru Ardelean alexandru.ardelean@analog.com ---

Changelog v1 -> v2: * split the initial series into just 3 patches that fix the `match_string()` helper and start introducing a new version of this helper, which computes array-size of static arrays

lib/string.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/string.c b/lib/string.c index 6016eb3ac73d..e2cf5acc83bd 100644 --- a/lib/string.c +++ b/lib/string.c @@ -681,8 +681,11 @@ int match_string(const char * const *array, size_t n, const char *string)

for (index = 0; index < n; index++) { item = array[index]; - if (!item) + if (!item) { + if (n != (size_t)-1) + continue; break; + } if (!strcmp(item, string)) return index; }

-- 2.20.1

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Alexandru Ardelean

28 May 28 May

9:39 a.m.

New subject: [alsa-devel] [PATCH 2/3][V2] treewide: rename match_string() -> __match_string()

This change does a rename of match_string() -> __match_string().

There are a few parts to the intention here (with this change): 1. Align with sysfs_match_string()/__sysfs_match_string() 2. This helps to group users of `match_string()`: a. those that use ARRAY_SIZE(_a) to specify the number of elements b. those that use -1 to pass a NULL terminated array of strings c. special users, which (after eliminating 1 & 2) are not that many

This change is done treewide. Updates to the new match_string() helper will be done on a per-subsystem basis, as the cadence of each subsystem differs.

diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 1b0149b2bb6c..8039759a9e82 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -3264,7 +3264,7 @@ scanhex(unsigned long *vp) regname[i] = c; } regname[i] = 0; - i = match_string(regnames, N_PTREGS, regname); + i = __match_string(regnames, N_PTREGS, regname); if (i < 0) { printf("invalid register name '%%%s'\n", regname); return 0; diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c index 4d36dcc1cf87..4ec7a5f7b94c 100644 --- a/arch/x86/kernel/cpu/mtrr/if.c +++ b/arch/x86/kernel/cpu/mtrr/if.c @@ -142,7 +142,7 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) return -EINVAL; ptr = skip_spaces(ptr + 5);

- i = match_string(mtrr_strings, MTRR_NUM_TYPES, ptr); + i = __match_string(mtrr_strings, MTRR_NUM_TYPES, ptr); if (i < 0) return i;

diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c index 2574d6fbb1ad..a23ec26cc95f 100644 --- a/drivers/ata/pata_hpt366.c +++ b/drivers/ata/pata_hpt366.c @@ -181,7 +181,7 @@ static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,

ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));

- i = match_string(list, -1, model_num); + i = __match_string(list, -1, model_num); if (i >= 0) { pr_warn("%s is not supported for %s\n", modestr, list[i]); return 1; diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c index fad6c6a87313..ac0499e4ae4b 100644 --- a/drivers/ata/pata_hpt37x.c +++ b/drivers/ata/pata_hpt37x.c @@ -229,7 +229,7 @@ static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,

ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));

- i = match_string(list, -1, model_num); + i = __match_string(list, -1, model_num); if (i >= 0) { pr_warn("%s is not supported for %s\n", modestr, list[i]); return 1; diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c index 04db9ae235e4..7bc1c619b721 100644 --- a/drivers/base/devcon.c +++ b/drivers/base/devcon.c @@ -70,7 +70,7 @@ void *device_connection_find_match(struct device *dev, const char *con_id, mutex_lock(&devcon_lock);

list_for_each_entry(con, &devcon_list, list) { - ep = match_string(con->endpoint, 2, devname); + ep = __match_string(con->endpoint, 2, devname); if (ep < 0) continue;

diff --git a/drivers/base/property.c b/drivers/base/property.c index 348b37e64944..67195d6bfdca 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -443,7 +443,7 @@ int fwnode_property_match_string(const struct fwnode_handle *fwnode, if (ret < 0) goto out;

- ret = match_string(values, nval, string); + ret = __match_string(values, nval, string); if (ret < 0) ret = -ENODATA; out: diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c index 770bb01f523e..91bb94d68798 100644 --- a/drivers/clk/bcm/clk-bcm2835.c +++ b/drivers/clk/bcm/clk-bcm2835.c @@ -1391,9 +1391,9 @@ static struct clk_hw *bcm2835_register_clock(struct bcm2835_cprman *cprman, for (i = 0; i < data->num_mux_parents; i++) { parents[i] = data->parents[i];

- ret = match_string(cprman_parent_names, - ARRAY_SIZE(cprman_parent_names), - parents[i]); + ret = __match_string(cprman_parent_names, + ARRAY_SIZE(cprman_parent_names), + parents[i]); if (ret >= 0) parents[i] = cprman->real_parent_names[ret]; } diff --git a/drivers/clk/rockchip/clk.c b/drivers/clk/rockchip/clk.c index d5fac5a8a3d7..2163bb54a663 100644 --- a/drivers/clk/rockchip/clk.c +++ b/drivers/clk/rockchip/clk.c @@ -280,8 +280,8 @@ static struct clk *rockchip_clk_register_frac_branch( struct clk *mux_clk; int ret;

- frac->mux_frac_idx = match_string(child->parent_names, - child->num_parents, name); + frac->mux_frac_idx = __match_string(child->parent_names, + child->num_parents, name); frac->mux_ops = &clk_mux_ops; frac->clk_nb.notifier_call = rockchip_clk_frac_notifier_cb;

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 34b54df41aaa..a1f79451308c 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -703,7 +703,7 @@ static ssize_t store_energy_performance_preference( if (ret != 1) return -EINVAL;

- ret = match_string(energy_perf_strings, -1, str_preference); + ret = __match_string(energy_perf_strings, -1, str_preference); if (ret < 0) return ret;

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index aec7bd86ae7e..527be82e1bac 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -278,7 +278,7 @@ static struct gpio_desc *of_find_regulator_gpio(struct device *dev, const char * if (!con_id) return ERR_PTR(-ENOENT);

- i = match_string(whitelist, ARRAY_SIZE(whitelist), con_id); + i = __match_string(whitelist, ARRAY_SIZE(whitelist), con_id); if (i < 0) return ERR_PTR(-ENOENT);

diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c index 1e5593575d23..53c55fc8b8c2 100644 --- a/drivers/gpu/drm/drm_edid_load.c +++ b/drivers/gpu/drm/drm_edid_load.c @@ -174,7 +174,7 @@ static void *edid_load(struct drm_connector *connector, const char *name, int i, valid_extensions = 0; bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS);

- builtin = match_string(generic_edid_name, GENERIC_EDIDS, name); + builtin = __match_string(generic_edid_name, GENERIC_EDIDS, name); if (builtin >= 0) { fwdata = generic_edid[builtin]; fwsize = sizeof(generic_edid[builtin]); diff --git a/drivers/gpu/drm/drm_panel_orientation_quirks.c b/drivers/gpu/drm/drm_panel_orientation_quirks.c index 521aff99b08a..063553adb22d 100644 --- a/drivers/gpu/drm/drm_panel_orientation_quirks.c +++ b/drivers/gpu/drm/drm_panel_orientation_quirks.c @@ -213,7 +213,7 @@ int drm_get_panel_orientation_quirk(int width, int height) if (!bios_date) continue;

- i = match_string(data->bios_dates, -1, bios_date); + i = __match_string(data->bios_dates, -1, bios_date); if (i >= 0) return data->orientation; } diff --git a/drivers/gpu/drm/i915/intel_pipe_crc.c b/drivers/gpu/drm/i915/intel_pipe_crc.c index e7c7be4911c1..3e6af7600c25 100644 --- a/drivers/gpu/drm/i915/intel_pipe_crc.c +++ b/drivers/gpu/drm/i915/intel_pipe_crc.c @@ -440,7 +440,7 @@ display_crc_ctl_parse_source(const char *buf, enum intel_pipe_crc_source *s) return 0; }

- i = match_string(pipe_crc_sources, ARRAY_SIZE(pipe_crc_sources), buf); + i = __match_string(pipe_crc_sources, ARRAY_SIZE(pipe_crc_sources), buf); if (i < 0) return i;

diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c index fd3b5da44619..5e880a1ebcde 100644 --- a/drivers/ide/hpt366.c +++ b/drivers/ide/hpt366.c @@ -534,7 +534,7 @@ static const struct hpt_info hpt371n = {

static bool check_in_drive_list(ide_drive_t *drive, const char **list) { - return match_string(list, -1, (char *)&drive->id[ATA_ID_PROD]) >= 0; + return __match_string(list, -1, (char *)&drive->id[ATA_ID_PROD]) >= 0; }

static struct hpt_info *hpt3xx_get_info(struct device *dev) diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c index 800986a79704..9aaacb5bdb26 100644 --- a/drivers/mfd/omap-usb-host.c +++ b/drivers/mfd/omap-usb-host.c @@ -509,7 +509,7 @@ static int usbhs_omap_get_dt_pdata(struct device *dev, continue;

/* get 'enum usbhs_omap_port_mode' from port mode string */ - ret = match_string(port_modes, ARRAY_SIZE(port_modes), mode); + ret = __match_string(port_modes, ARRAY_SIZE(port_modes), mode); if (ret < 0) { dev_warn(dev, "Invalid port%d-mode "%s" in device tree\n", i, mode); diff --git a/drivers/mmc/host/sdhci-xenon-phy.c b/drivers/mmc/host/sdhci-xenon-phy.c index 8d07ee1b8f08..59b7a6cac995 100644 --- a/drivers/mmc/host/sdhci-xenon-phy.c +++ b/drivers/mmc/host/sdhci-xenon-phy.c @@ -821,7 +821,7 @@ static int xenon_add_phy(struct device_node *np, struct sdhci_host *host, struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); int ret;

- priv->phy_type = match_string(phy_types, NR_PHY_TYPES, phy_name); + priv->phy_type = __match_string(phy_types, NR_PHY_TYPES, phy_name); if (priv->phy_type < 0) { dev_err(mmc_dev(host->mmc), "Unable to determine PHY name %s. Use default eMMC 5.1 PHY\n", diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c index d4ff6b44de2c..969f09a56ba7 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c @@ -667,7 +667,7 @@ iwl_dbgfs_bt_force_ant_write(struct iwl_mvm *mvm, char *buf, }; int ret, bt_force_ant_mode;

- ret = match_string(modes_str, ARRAY_SIZE(modes_str), buf); + ret = __match_string(modes_str, ARRAY_SIZE(modes_str), buf); if (ret < 0) return ret;

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index b45bc47d04fe..02f54802fca0 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -206,7 +206,7 @@ void pcie_ecrc_get_policy(char *str) { int i;

- i = match_string(ecrc_policy_str, ARRAY_SIZE(ecrc_policy_str), str); + i = __match_string(ecrc_policy_str, ARRAY_SIZE(ecrc_policy_str), str); if (i < 0) return;

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c index 0417213ed68b..060ba6a0a031 100644 --- a/drivers/phy/tegra/xusb.c +++ b/drivers/phy/tegra/xusb.c @@ -119,7 +119,7 @@ int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane, if (err < 0) return err;

- err = match_string(lane->soc->funcs, lane->soc->num_funcs, function); + err = __match_string(lane->soc->funcs, lane->soc->num_funcs, function); if (err < 0) { dev_err(dev, "invalid function "%s" for lane "%pOFn"\n", function, np); @@ -568,7 +568,7 @@ static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2) usb2->internal = of_property_read_bool(np, "nvidia,internal");

if (!of_property_read_string(np, "mode", &mode)) { - int err = match_string(modes, ARRAY_SIZE(modes), mode); + int err = __match_string(modes, ARRAY_SIZE(modes), mode); if (err < 0) { dev_err(&port->dev, "invalid value %s for "mode"\n", mode); diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c index 6462d3ca7ceb..07a5bcaa0067 100644 --- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c +++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c @@ -348,7 +348,7 @@ static int armada_37xx_pmx_set_by_name(struct pinctrl_dev *pctldev, dev_dbg(info->dev, "enable function %s group %s\n", name, grp->name);

- func = match_string(grp->funcs, NB_FUNCS, name); + func = __match_string(grp->funcs, NB_FUNCS, name); if (func < 0) return -ENOTSUPP;

@@ -938,7 +938,7 @@ static int armada_37xx_fill_func(struct armada_37xx_pinctrl *info) struct armada_37xx_pin_group *gp = &info->groups[g]; int f;

- f = match_string(gp->funcs, NB_FUNCS, name); + f = __match_string(gp->funcs, NB_FUNCS, name); if (f < 0) continue;

diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index 4d0cc1889dd9..041326d0ab7b 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -348,7 +348,7 @@ int pinmux_map_to_setting(const struct pinctrl_map *map, } if (map->data.mux.group) { group = map->data.mux.group; - ret = match_string(groups, num_groups, group); + ret = __match_string(groups, num_groups, group); if (ret < 0) { dev_err(pctldev->dev, "invalid group "%s" for function "%s"\n", diff --git a/drivers/power/supply/ab8500_btemp.c b/drivers/power/supply/ab8500_btemp.c index 708fd58cd62b..1cf3b43a41e4 100644 --- a/drivers/power/supply/ab8500_btemp.c +++ b/drivers/power/supply/ab8500_btemp.c @@ -858,7 +858,7 @@ static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) * For all psy where the name of your driver * appears in any supplied_to */ - j = match_string(supplicants, ext->num_supplicants, psy->desc->name); + j = __match_string(supplicants, ext->num_supplicants, psy->desc->name); if (j < 0) return 0;

diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c index 98b335042ba6..8094f38e4085 100644 --- a/drivers/power/supply/ab8500_charger.c +++ b/drivers/power/supply/ab8500_charger.c @@ -1876,7 +1876,7 @@ static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) di = to_ab8500_charger_usb_device_info(usb_chg);

/* For all psy where the driver name appears in any supplied_to */ - j = match_string(supplicants, ext->num_supplicants, psy->desc->name); + j = __match_string(supplicants, ext->num_supplicants, psy->desc->name); if (j < 0) return 0;

diff --git a/drivers/power/supply/ab8500_fg.c b/drivers/power/supply/ab8500_fg.c index 776102c31305..408339c5a4a8 100644 --- a/drivers/power/supply/ab8500_fg.c +++ b/drivers/power/supply/ab8500_fg.c @@ -2174,7 +2174,7 @@ static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data) * For all psy where the name of your driver * appears in any supplied_to */ - j = match_string(supplicants, ext->num_supplicants, psy->desc->name); + j = __match_string(supplicants, ext->num_supplicants, psy->desc->name); if (j < 0) return 0;

diff --git a/drivers/power/supply/abx500_chargalg.c b/drivers/power/supply/abx500_chargalg.c index 947709cdd14e..b2fcd0ba379d 100644 --- a/drivers/power/supply/abx500_chargalg.c +++ b/drivers/power/supply/abx500_chargalg.c @@ -946,7 +946,7 @@ static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data) psy = (struct power_supply *)data; di = power_supply_get_drvdata(psy); /* For all psy where the driver name appears in any supplied_to */ - j = match_string(supplicants, ext->num_supplicants, psy->desc->name); + j = __match_string(supplicants, ext->num_supplicants, psy->desc->name); if (j < 0) return 0;

diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c index a6900aa0d2ed..70e758e4f4f4 100644 --- a/drivers/power/supply/charger-manager.c +++ b/drivers/power/supply/charger-manager.c @@ -2022,8 +2022,8 @@ void cm_notify_event(struct power_supply *psy, enum cm_event_types type,

mutex_lock(&cm_list_mtx); list_for_each_entry(cm, &cm_list, entry) { - if (match_string(cm->desc->psy_charger_stat, -1, - psy->desc->name) >= 0) { + if (__match_string(cm->desc->psy_charger_stat, -1, + psy->desc->name) >= 0) { found_power_supply = true; break; } diff --git a/drivers/staging/gdm724x/gdm_tty.c b/drivers/staging/gdm724x/gdm_tty.c index 6e813693a766..6e147a324652 100644 --- a/drivers/staging/gdm724x/gdm_tty.c +++ b/drivers/staging/gdm724x/gdm_tty.c @@ -56,8 +56,8 @@ static int gdm_tty_install(struct tty_driver *driver, struct tty_struct *tty) struct gdm *gdm = NULL; int ret;

- ret = match_string(DRIVER_STRING, TTY_MAX_COUNT, - tty->driver->driver_name); + ret = __match_string(DRIVER_STRING, TTY_MAX_COUNT, + tty->driver->driver_name); if (ret < 0) return -ENODEV;

diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c index 18f5dcf58b0d..97f87d758e8a 100644 --- a/drivers/usb/common/common.c +++ b/drivers/usb/common/common.c @@ -84,7 +84,7 @@ enum usb_device_speed usb_get_maximum_speed(struct device *dev) if (ret < 0) return USB_SPEED_UNKNOWN;

- ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed); + ret = __match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);

return (ret < 0) ? USB_SPEED_UNKNOWN : ret; } @@ -122,7 +122,7 @@ static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str) { int ret;

- ret = match_string(usb_dr_modes, ARRAY_SIZE(usb_dr_modes), str); + ret = __match_string(usb_dr_modes, ARRAY_SIZE(usb_dr_modes), str); return (ret < 0) ? USB_DR_MODE_UNKNOWN : ret; }

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 2eb623841847..4abc5a76ec51 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -1409,8 +1409,8 @@ EXPORT_SYMBOL_GPL(typec_set_pwr_opmode); */ int typec_find_port_power_role(const char *name) { - return match_string(typec_port_power_roles, - ARRAY_SIZE(typec_port_power_roles), name); + return __match_string(typec_port_power_roles, + ARRAY_SIZE(typec_port_power_roles), name); } EXPORT_SYMBOL_GPL(typec_find_port_power_role);

@@ -1424,7 +1424,7 @@ EXPORT_SYMBOL_GPL(typec_find_port_power_role); */ int typec_find_power_role(const char *name) { - return match_string(typec_roles, ARRAY_SIZE(typec_roles), name); + return __match_string(typec_roles, ARRAY_SIZE(typec_roles), name); } EXPORT_SYMBOL_GPL(typec_find_power_role);

@@ -1438,8 +1438,8 @@ EXPORT_SYMBOL_GPL(typec_find_power_role); */ int typec_find_port_data_role(const char *name) { - return match_string(typec_port_data_roles, - ARRAY_SIZE(typec_port_data_roles), name); + return __match_string(typec_port_data_roles, + ARRAY_SIZE(typec_port_data_roles), name); } EXPORT_SYMBOL_GPL(typec_find_port_data_role);

diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c index c674abe3cf99..0389e4391faf 100644 --- a/drivers/usb/typec/tps6598x.c +++ b/drivers/usb/typec/tps6598x.c @@ -423,7 +423,7 @@ static int tps6598x_check_mode(struct tps6598x *tps) if (ret) return ret;

- switch (match_string(modes, ARRAY_SIZE(modes), mode)) { + switch (__match_string(modes, ARRAY_SIZE(modes), mode)) { case TPS_MODE_APP: return 0; case TPS_MODE_BOOT: diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 82fcf07fa9ea..01c7bb7316fb 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -638,9 +638,9 @@ static bool vfio_dev_whitelisted(struct device *dev, struct device_driver *drv) return true; }

- return match_string(vfio_driver_whitelist, - ARRAY_SIZE(vfio_driver_whitelist), - drv->name) >= 0; + return __match_string(vfio_driver_whitelist, + ARRAY_SIZE(vfio_driver_whitelist), + drv->name) >= 0; }

/* diff --git a/drivers/video/fbdev/pxafb.c b/drivers/video/fbdev/pxafb.c index d59c8a59f582..0025781e6e1e 100644 --- a/drivers/video/fbdev/pxafb.c +++ b/drivers/video/fbdev/pxafb.c @@ -2129,7 +2129,7 @@ static int of_get_pxafb_display(struct device *dev, struct device_node *disp, if (ret) s = "color-tft";

- i = match_string(lcd_types, -1, s); + i = __match_string(lcd_types, -1, s); if (i < 0) { dev_err(dev, "lcd-type %s is unknown\n", s); return i; diff --git a/fs/ubifs/auth.c b/fs/ubifs/auth.c index 60f43b93d06e..076feb5a9cb6 100644 --- a/fs/ubifs/auth.c +++ b/fs/ubifs/auth.c @@ -216,8 +216,8 @@ int ubifs_init_authentication(struct ubifs_info *c) return -EINVAL; }

- c->auth_hash_algo = match_string(hash_algo_name, HASH_ALGO__LAST, - c->auth_hash_name); + c->auth_hash_algo = __match_string(hash_algo_name, HASH_ALGO__LAST, + c->auth_hash_name); if ((int)c->auth_hash_algo < 0) { ubifs_err(c, "Unknown hash algo %s specified", c->auth_hash_name); diff --git a/include/linux/string.h b/include/linux/string.h index 4deb11f7976b..7149fcdf62df 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -195,7 +195,7 @@ static inline int strtobool(const char *s, bool *res) return kstrtobool(s, res); }

-int match_string(const char * const *array, size_t n, const char *string); +int __match_string(const char * const *array, size_t n, const char *string); int __sysfs_match_string(const char * const *array, size_t n, const char *s);

/** diff --git a/kernel/cgroup/rdma.c b/kernel/cgroup/rdma.c index 1d75ae7f1cb7..65d4df148603 100644 --- a/kernel/cgroup/rdma.c +++ b/kernel/cgroup/rdma.c @@ -367,7 +367,7 @@ static int parse_resource(char *c, int *intval) if (!name || !value) return -EINVAL;

- i = match_string(rdmacg_resource_names, RDMACG_RESOURCE_MAX, name); + i = __match_string(rdmacg_resource_names, RDMACG_RESOURCE_MAX, name); if (i < 0) return i;

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 678bfb9bd87f..ef89323c1541 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -111,7 +111,7 @@ static int sched_feat_set(char *cmp) cmp += 3; }

- i = match_string(sched_feat_names, __SCHED_FEAT_NR, cmp); + i = __match_string(sched_feat_names, __SCHED_FEAT_NR, cmp); if (i < 0) return i;

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 1c80521fd436..a818c6145d94 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4625,7 +4625,7 @@ static int trace_set_options(struct trace_array *tr, char *option)

mutex_lock(&trace_types_lock);

- ret = match_string(trace_options, -1, cmp); + ret = __match_string(trace_options, -1, cmp); /* If no option could be set, test the specific tracer options */ if (ret < 0) ret = set_tracer_option(tr, cmp, neg); diff --git a/lib/string.c b/lib/string.c index e2cf5acc83bd..1797cf31760c 100644 --- a/lib/string.c +++ b/lib/string.c @@ -666,7 +666,7 @@ bool sysfs_streq(const char *s1, const char *s2) EXPORT_SYMBOL(sysfs_streq);

/** - * match_string - matches given string in an array + * __match_string - matches given string in an array * @array: array of strings * @n: number of strings in the array or -1 for NULL terminated arrays * @string: string to match with @@ -674,7 +674,7 @@ EXPORT_SYMBOL(sysfs_streq); * Return: * index of a @string in the @array if matches, or %-EINVAL otherwise. */ -int match_string(const char * const *array, size_t n, const char *string) +int __match_string(const char * const *array, size_t n, const char *string) { int index; const char *item; @@ -692,7 +692,7 @@ int match_string(const char * const *array, size_t n, const char *string)

return -EINVAL; } -EXPORT_SYMBOL(match_string); +EXPORT_SYMBOL(__match_string);

/** * __sysfs_match_string - matches given string in an array @@ -700,7 +700,7 @@ EXPORT_SYMBOL(match_string); * @n: number of strings in the array or -1 for NULL terminated arrays * @str: string to match with * - * Returns index of @str in the @array or -EINVAL, just like match_string(). + * Returns index of @str in the @array or -EINVAL, just like __match_string(). * Uses sysfs_streq instead of strcmp for matching. */ int __sysfs_match_string(const char * const *array, size_t n, const char *str) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 2219e747df49..97bcf4658317 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2755,7 +2755,7 @@ int mpol_parse_str(char *str, struct mempolicy **mpol) if (flags) *flags++ = '\0'; /* terminate mode string */

- mode = match_string(policy_modes, MPOL_MAX, str); + mode = __match_string(policy_modes, MPOL_MAX, str); if (mode < 0) goto out;

diff --git a/mm/vmpressure.c b/mm/vmpressure.c index 4854584ec436..d43f33139568 100644 --- a/mm/vmpressure.c +++ b/mm/vmpressure.c @@ -378,7 +378,7 @@ int vmpressure_register_event(struct mem_cgroup *memcg,

/* Find required level */ token = strsep(&spec, ","); - level = match_string(vmpressure_str_levels, VMPRESSURE_NUM_LEVELS, token); + level = __match_string(vmpressure_str_levels, VMPRESSURE_NUM_LEVELS, token); if (level < 0) { ret = level; goto out; @@ -387,7 +387,7 @@ int vmpressure_register_event(struct mem_cgroup *memcg, /* Find optional mode */ token = strsep(&spec, ","); if (token) { - mode = match_string(vmpressure_str_modes, VMPRESSURE_NUM_MODES, token); + mode = __match_string(vmpressure_str_modes, VMPRESSURE_NUM_MODES, token); if (mode < 0) { ret = mode; goto out; diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index 87500bde5a92..45d28db85e5a 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -1480,7 +1480,7 @@ static int param_set_audit(const char *val, const struct kernel_param *kp) if (apparmor_initialized && !policy_admin_capable(NULL)) return -EPERM;

- i = match_string(audit_mode_names, AUDIT_MAX_INDEX, val); + i = __match_string(audit_mode_names, AUDIT_MAX_INDEX, val); if (i < 0) return -EINVAL;

@@ -1509,7 +1509,7 @@ static int param_set_mode(const char *val, const struct kernel_param *kp) if (apparmor_initialized && !policy_admin_capable(NULL)) return -EPERM;

- i = match_string(aa_profile_mode_names, APPARMOR_MODE_NAMES_MAX_INDEX, + i = __match_string(aa_profile_mode_names, APPARMOR_MODE_NAMES_MAX_INDEX, val); if (i < 0) return -EINVAL; diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 357edd140c09..618842f85f2d 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -61,7 +61,7 @@ static int __init hash_setup(char *str) goto out; }

- i = match_string(hash_algo_name, HASH_ALGO__LAST, str); + i = __match_string(hash_algo_name, HASH_ALGO__LAST, str); if (i < 0) return 1;

diff --git a/sound/firewire/oxfw/oxfw.c b/sound/firewire/oxfw/oxfw.c index 3d27f3378d5d..9ec5316f3bb5 100644 --- a/sound/firewire/oxfw/oxfw.c +++ b/sound/firewire/oxfw/oxfw.c @@ -57,7 +57,7 @@ static bool detect_loud_models(struct fw_unit *unit) if (err < 0) return false;

- return match_string(models, ARRAY_SIZE(models), model) >= 0; + return __match_string(models, ARRAY_SIZE(models), model) >= 0; }

static int name_card(struct snd_oxfw *oxfw) diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c index 81af21ac1439..13c2fb75fd71 100644 --- a/sound/pci/oxygen/oxygen_mixer.c +++ b/sound/pci/oxygen/oxygen_mixer.c @@ -1086,7 +1086,7 @@ static int add_controls(struct oxygen *chip, err = snd_ctl_add(chip->card, ctl); if (err < 0) return err; - j = match_string(known_ctl_names, CONTROL_COUNT, ctl->id.name); + j = __match_string(known_ctl_names, CONTROL_COUNT, ctl->id.name); if (j >= 0) { chip->controls[j] = ctl; ctl->private_free = oxygen_any_ctl_free; diff --git a/sound/soc/codecs/max98088.c b/sound/soc/codecs/max98088.c index ca172a4b6849..3ef743075bda 100644 --- a/sound/soc/codecs/max98088.c +++ b/sound/soc/codecs/max98088.c @@ -1405,7 +1405,7 @@ static int max98088_get_channel(struct snd_soc_component *component, const char { int ret;

- ret = match_string(eq_mode_name, ARRAY_SIZE(eq_mode_name), name); + ret = __match_string(eq_mode_name, ARRAY_SIZE(eq_mode_name), name); if (ret < 0) dev_err(component->dev, "Bad EQ channel name '%s'\n", name); return ret; diff --git a/sound/soc/codecs/max98095.c b/sound/soc/codecs/max98095.c index 3b3a10da7f40..cd69916d5dcb 100644 --- a/sound/soc/codecs/max98095.c +++ b/sound/soc/codecs/max98095.c @@ -1636,7 +1636,7 @@ static int max98095_get_bq_channel(struct snd_soc_component *component, { int ret;

- ret = match_string(bq_mode_name, ARRAY_SIZE(bq_mode_name), name); + ret = __match_string(bq_mode_name, ARRAY_SIZE(bq_mode_name), name); if (ret < 0) dev_err(component->dev, "Bad biquad channel name '%s'\n", name); return ret; diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 81a7a12196ff..33ccea0518b1 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -753,7 +753,7 @@ static int dapm_connect_mux(struct snd_soc_dapm_context *dapm, item = 0; }

- i = match_string(e->texts, e->items, control_name); + i = __match_string(e->texts, e->items, control_name); if (i < 0) return -ENODEV;

-- 2.20.1

Alexandru Ardelean

9:39 a.m.

New subject: [alsa-devel] [PATCH 3/3][V2] lib: re-introduce new match_string() helper/macro

This change re-introduces `match_string()` as a macro that uses ARRAY_SIZE() to compute the size of the array.

After this change, work can start on migrating subsystems to use this new helper. Since the original helper is pretty used, migrating to this new one will take a while, and will be reviewed by each subsystem.

Signed-off-by: Alexandru Ardelean alexandru.ardelean@analog.com --- include/linux/string.h | 9 +++++++++ 1 file changed, 9 insertions(+)

diff --git a/include/linux/string.h b/include/linux/string.h index 7149fcdf62df..34491b075449 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -198,6 +198,15 @@ static inline int strtobool(const char *s, bool *res) int __match_string(const char * const *array, size_t n, const char *string); int __sysfs_match_string(const char * const *array, size_t n, const char *s);

+/** + * match_string - matches given string in an array + * @_a: array of strings + * @_s: string to match with + * + * Helper for __match_string(). Calculates the size of @a automatically. + */ +#define match_string(_a, _s) __match_string(_a, ARRAY_SIZE(_a), _s) + /** * sysfs_match_string - matches given string in an array * @_a: array of strings

-- 2.20.1

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Alexandru Ardelean