From: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
The debugfs code can be made a whole lot more
efficient by using debugfs_remove_recursive(),
the large chunk of variables can completely go
away and by moving two variables we no longer
need to allocate an extra chunk of memory.
Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-debug.h | 64 +-------
drivers/net/wireless/iwlwifi/iwl-debugfs.c | 239 ++++++++++------------------
drivers/net/wireless/iwlwifi/iwl-dev.h | 3 +-
3 files changed, 91 insertions(+), 215 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index aff1dc0..1c7b53d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -67,63 +67,6 @@ do { \
DUMP_PREFIX_OFFSET, 16, 1, p, len, 1); \
} while (0)
-#ifdef CONFIG_IWLWIFI_DEBUGFS
-struct iwl_debugfs {
- const char *name;
- struct dentry *dir_drv;
- struct dentry *dir_data;
- struct dentry *dir_debug;
- struct dentry *dir_rf;
- struct dir_data_files {
- struct dentry *file_sram;
- struct dentry *file_nvm;
- struct dentry *file_stations;
- struct dentry *file_log_event;
- struct dentry *file_channels;
- struct dentry *file_status;
- struct dentry *file_interrupt;
- struct dentry *file_qos;
- struct dentry *file_thermal_throttling;
- struct dentry *file_led;
- struct dentry *file_disable_ht40;
- struct dentry *file_sleep_level_override;
- struct dentry *file_current_sleep_command;
- } dbgfs_data_files;
- struct dir_rf_files {
- struct dentry *file_disable_sensitivity;
- struct dentry *file_disable_chain_noise;
- struct dentry *file_disable_tx_power;
- } dbgfs_rf_files;
- struct dir_debug_files {
- struct dentry *file_rx_statistics;
- struct dentry *file_tx_statistics;
- struct dentry *file_traffic_log;
- struct dentry *file_rx_queue;
- struct dentry *file_tx_queue;
- struct dentry *file_ucode_rx_stats;
- struct dentry *file_ucode_tx_stats;
- struct dentry *file_ucode_general_stats;
- struct dentry *file_sensitivity;
- struct dentry *file_chain_noise;
- struct dentry *file_tx_power;
- struct dentry *file_power_save_status;
- struct dentry *file_clear_ucode_statistics;
- struct dentry *file_clear_traffic_statistics;
- struct dentry *file_csr;
- struct dentry *file_ucode_tracing;
- struct dentry *file_fh_reg;
- struct dentry *file_missed_beacon;
- struct dentry *file_internal_scan;
- struct dentry *file_plcp_delta;
- } dbgfs_debug_files;
- u32 sram_offset;
- u32 sram_len;
-};
-
-int iwl_dbgfs_register(struct iwl_priv *priv, const char *name);
-void iwl_dbgfs_unregister(struct iwl_priv *priv);
-#endif
-
#else
#define IWL_DEBUG(__priv, level, fmt, args...)
#define IWL_DEBUG_LIMIT(__priv, level, fmt, args...)
@@ -132,9 +75,10 @@ static inline void iwl_print_hex_dump(struct iwl_priv *priv, int level,
{}
#endif /* CONFIG_IWLWIFI_DEBUG */
-
-
-#ifndef CONFIG_IWLWIFI_DEBUGFS
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+int iwl_dbgfs_register(struct iwl_priv *priv, const char *name);
+void iwl_dbgfs_unregister(struct iwl_priv *priv);
+#else
static inline int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
{
return 0;
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 3f9c039..5c8377b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -41,43 +41,28 @@
#include "iwl-calib.h"
/* create and remove of files */
-#define DEBUGFS_ADD_DIR(name, parent) do { \
- dbgfs->dir_##name = debugfs_create_dir(#name, parent); \
- if (!(dbgfs->dir_##name)) \
- goto err; \
+#define DEBUGFS_ADD_FILE(name, parent, mode) do { \
+ if (!debugfs_create_file(#name, mode, parent, priv, \
+ &iwl_dbgfs_##name##_ops)) \
+ goto err; \
} while (0)
-#define DEBUGFS_ADD_FILE(name, parent, mode) do { \
- dbgfs->dbgfs_##parent##_files.file_##name = \
- debugfs_create_file(#name, mode, \
- dbgfs->dir_##parent, priv, \
- &iwl_dbgfs_##name##_ops); \
- if (!(dbgfs->dbgfs_##parent##_files.file_##name)) \
- goto err; \
+#define DEBUGFS_ADD_BOOL(name, parent, ptr) do { \
+ struct dentry *__tmp; \
+ __tmp = debugfs_create_bool(#name, S_IWUSR | S_IRUSR, \
+ parent, ptr); \
+ if (IS_ERR(__tmp) || !__tmp) \
+ goto err; \
} while (0)
-#define DEBUGFS_ADD_BOOL(name, parent, ptr) do { \
- dbgfs->dbgfs_##parent##_files.file_##name = \
- debugfs_create_bool(#name, S_IWUSR | S_IRUSR, \
- dbgfs->dir_##parent, ptr); \
- if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name) \
- || !dbgfs->dbgfs_##parent##_files.file_##name) \
- goto err; \
+#define DEBUGFS_ADD_X32(name, parent, ptr) do { \
+ struct dentry *__tmp; \
+ __tmp = debugfs_create_x32(#name, S_IWUSR | S_IRUSR, \
+ parent, ptr); \
+ if (IS_ERR(__tmp) || !__tmp) \
+ goto err; \
} while (0)
-#define DEBUGFS_ADD_X32(name, parent, ptr) do { \
- dbgfs->dbgfs_##parent##_files.file_##name = \
- debugfs_create_x32(#name, S_IRUSR, dbgfs->dir_##parent, ptr); \
- if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name) \
- || !dbgfs->dbgfs_##parent##_files.file_##name) \
- goto err; \
-} while (0)
-
-#define DEBUGFS_REMOVE(name) do { \
- debugfs_remove(name); \
- name = NULL; \
-} while (0);
-
/* file operation */
#define DEBUGFS_READ_FUNC(name) \
static ssize_t iwl_dbgfs_##name##_read(struct file *file, \
@@ -236,24 +221,24 @@ static ssize_t iwl_dbgfs_sram_read(struct file *file,
size_t bufsz;
/* default is to dump the entire data segment */
- if (!priv->dbgfs->sram_offset && !priv->dbgfs->sram_len) {
- priv->dbgfs->sram_offset = 0x800000;
+ if (!priv->dbgfs_sram_offset && !priv->dbgfs_sram_len) {
+ priv->dbgfs_sram_offset = 0x800000;
if (priv->ucode_type == UCODE_INIT)
- priv->dbgfs->sram_len = priv->ucode_init_data.len;
+ priv->dbgfs_sram_len = priv->ucode_init_data.len;
else
- priv->dbgfs->sram_len = priv->ucode_data.len;
+ priv->dbgfs_sram_len = priv->ucode_data.len;
}
- bufsz = 30 + priv->dbgfs->sram_len * sizeof(char) * 10;
+ bufsz = 30 + priv->dbgfs_sram_len * sizeof(char) * 10;
buf = kmalloc(bufsz, GFP_KERNEL);
if (!buf)
return -ENOMEM;
pos += scnprintf(buf + pos, bufsz - pos, "sram_len: 0x%x\n",
- priv->dbgfs->sram_len);
+ priv->dbgfs_sram_len);
pos += scnprintf(buf + pos, bufsz - pos, "sram_offset: 0x%x\n",
- priv->dbgfs->sram_offset);
- for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
- val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
- priv->dbgfs->sram_len - i);
+ priv->dbgfs_sram_offset);
+ for (i = priv->dbgfs_sram_len; i > 0; i -= 4) {
+ val = iwl_read_targ_mem(priv, priv->dbgfs_sram_offset + \
+ priv->dbgfs_sram_len - i);
if (i < 4) {
switch (i) {
case 1:
@@ -293,11 +278,11 @@ static ssize_t iwl_dbgfs_sram_write(struct file *file,
return -EFAULT;
if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
- priv->dbgfs->sram_offset = offset;
- priv->dbgfs->sram_len = len;
+ priv->dbgfs_sram_offset = offset;
+ priv->dbgfs_sram_len = len;
} else {
- priv->dbgfs->sram_offset = 0;
- priv->dbgfs->sram_len = 0;
+ priv->dbgfs_sram_offset = 0;
+ priv->dbgfs_sram_len = 0;
}
return count;
@@ -2263,75 +2248,73 @@ DEBUGFS_READ_WRITE_FILE_OPS(plcp_delta);
*/
int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
{
- struct iwl_debugfs *dbgfs;
struct dentry *phyd = priv->hw->wiphy->debugfsdir;
- int ret = 0;
+ struct dentry *dir_drv, *dir_data, *dir_rf, *dir_debug;
- dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL);
- if (!dbgfs) {
- ret = -ENOMEM;
- goto err;
- }
+ dir_drv = debugfs_create_dir(name, phyd);
+ if (!dir_drv)
+ return -ENOMEM;
- priv->dbgfs = dbgfs;
- dbgfs->name = name;
- dbgfs->dir_drv = debugfs_create_dir(name, phyd);
- if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)) {
- ret = -ENOENT;
+ priv->debugfs_dir = dir_drv;
+
+ dir_data = debugfs_create_dir("data", dir_drv);
+ if (!dir_data)
+ goto err;
+ dir_rf = debugfs_create_dir("rf", dir_drv);
+ if (!dir_rf)
+ goto err;
+ dir_debug = debugfs_create_dir("debug", dir_drv);
+ if (!dir_debug)
goto err;
- }
- DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
- DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
- DEBUGFS_ADD_DIR(debug, dbgfs->dir_drv);
- DEBUGFS_ADD_FILE(nvm, data, S_IRUSR);
- DEBUGFS_ADD_FILE(sram, data, S_IWUSR | S_IRUSR);
- DEBUGFS_ADD_FILE(log_event, data, S_IWUSR | S_IRUSR);
- DEBUGFS_ADD_FILE(stations, data, S_IRUSR);
- DEBUGFS_ADD_FILE(channels, data, S_IRUSR);
- DEBUGFS_ADD_FILE(status, data, S_IRUSR);
- DEBUGFS_ADD_FILE(interrupt, data, S_IWUSR | S_IRUSR);
- DEBUGFS_ADD_FILE(qos, data, S_IRUSR);
- DEBUGFS_ADD_FILE(led, data, S_IRUSR);
- DEBUGFS_ADD_FILE(sleep_level_override, data, S_IWUSR | S_IRUSR);
- DEBUGFS_ADD_FILE(current_sleep_command, data, S_IRUSR);
- DEBUGFS_ADD_FILE(thermal_throttling, data, S_IRUSR);
- DEBUGFS_ADD_FILE(disable_ht40, data, S_IWUSR | S_IRUSR);
- DEBUGFS_ADD_FILE(rx_statistics, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(tx_statistics, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(traffic_log, debug, S_IWUSR | S_IRUSR);
- DEBUGFS_ADD_FILE(rx_queue, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(tx_queue, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(tx_power, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(power_save_status, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(clear_ucode_statistics, debug, S_IWUSR);
- DEBUGFS_ADD_FILE(clear_traffic_statistics, debug, S_IWUSR);
- DEBUGFS_ADD_FILE(csr, debug, S_IWUSR);
- DEBUGFS_ADD_FILE(fh_reg, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(missed_beacon, debug, S_IWUSR);
- DEBUGFS_ADD_FILE(internal_scan, debug, S_IWUSR);
- DEBUGFS_ADD_FILE(plcp_delta, debug, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(nvm, dir_data, S_IRUSR);
+ DEBUGFS_ADD_FILE(sram, dir_data, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(log_event, dir_data, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(stations, dir_data, S_IRUSR);
+ DEBUGFS_ADD_FILE(channels, dir_data, S_IRUSR);
+ DEBUGFS_ADD_FILE(status, dir_data, S_IRUSR);
+ DEBUGFS_ADD_FILE(interrupt, dir_data, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(qos, dir_data, S_IRUSR);
+ DEBUGFS_ADD_FILE(led, dir_data, S_IRUSR);
+ DEBUGFS_ADD_FILE(sleep_level_override, dir_data, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(current_sleep_command, dir_data, S_IRUSR);
+ DEBUGFS_ADD_FILE(thermal_throttling, dir_data, S_IRUSR);
+ DEBUGFS_ADD_FILE(disable_ht40, dir_data, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(rx_statistics, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(tx_statistics, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(traffic_log, dir_debug, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(rx_queue, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(tx_queue, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(tx_power, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(power_save_status, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(clear_ucode_statistics, dir_debug, S_IWUSR);
+ DEBUGFS_ADD_FILE(clear_traffic_statistics, dir_debug, S_IWUSR);
+ DEBUGFS_ADD_FILE(csr, dir_debug, S_IWUSR);
+ DEBUGFS_ADD_FILE(fh_reg, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(missed_beacon, dir_debug, S_IWUSR);
+ DEBUGFS_ADD_FILE(internal_scan, dir_debug, S_IWUSR);
+ DEBUGFS_ADD_FILE(plcp_delta, dir_debug, S_IWUSR | S_IRUSR);
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
- DEBUGFS_ADD_FILE(ucode_rx_stats, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(ucode_tx_stats, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(ucode_general_stats, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(sensitivity, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(chain_noise, debug, S_IRUSR);
- DEBUGFS_ADD_FILE(ucode_tracing, debug, S_IWUSR | S_IRUSR);
+ DEBUGFS_ADD_FILE(ucode_rx_stats, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(ucode_tx_stats, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(ucode_general_stats, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(sensitivity, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(chain_noise, dir_debug, S_IRUSR);
+ DEBUGFS_ADD_FILE(ucode_tracing, dir_debug, S_IWUSR | S_IRUSR);
}
- DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
- DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
+ DEBUGFS_ADD_BOOL(disable_sensitivity, dir_rf, &priv->disable_sens_cal);
+ DEBUGFS_ADD_BOOL(disable_chain_noise, dir_rf,
&priv->disable_chain_noise_cal);
if (((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) ||
((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_3945))
- DEBUGFS_ADD_BOOL(disable_tx_power, rf,
+ DEBUGFS_ADD_BOOL(disable_tx_power, dir_rf,
&priv->disable_tx_power_cal);
return 0;
err:
- IWL_ERR(priv, "Can't open the debugfs directory\n");
+ IWL_ERR(priv, "Can't create the debugfs directory\n");
iwl_dbgfs_unregister(priv);
- return ret;
+ return -ENOMEM;
}
EXPORT_SYMBOL(iwl_dbgfs_register);
@@ -2341,63 +2324,11 @@ EXPORT_SYMBOL(iwl_dbgfs_register);
*/
void iwl_dbgfs_unregister(struct iwl_priv *priv)
{
- if (!priv->dbgfs)
+ if (!priv->debugfs_dir)
return;
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sleep_level_override);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_current_sleep_command);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_nvm);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_channels);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_status);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_interrupt);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_qos);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_led);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_thermal_throttling);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_disable_ht40);
- DEBUGFS_REMOVE(priv->dbgfs->dir_data);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_rx_statistics);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_statistics);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_traffic_log);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_rx_queue);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_queue);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_power);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_power_save_status);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
- file_clear_ucode_statistics);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
- file_clear_traffic_statistics);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_csr);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_fh_reg);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_missed_beacon);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_internal_scan);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_plcp_delta);
- if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
- file_ucode_rx_stats);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
- file_ucode_tx_stats);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
- file_ucode_general_stats);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
- file_sensitivity);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
- file_chain_noise);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
- file_ucode_tracing);
- }
- DEBUGFS_REMOVE(priv->dbgfs->dir_debug);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
- if (((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) ||
- ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_3945))
- DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
- DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
- DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
- kfree(priv->dbgfs);
- priv->dbgfs = NULL;
+ debugfs_remove_recursive(priv->debugfs_dir);
+ priv->debugfs_dir = NULL;
}
EXPORT_SYMBOL(iwl_dbgfs_unregister);
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index a1f3ecb..d9f325b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1309,7 +1309,8 @@ struct iwl_priv {
u16 rx_traffic_idx;
u8 *tx_traffic;
u8 *rx_traffic;
- struct iwl_debugfs *dbgfs;
+ struct dentry *debugfs_dir;
+ u32 dbgfs_sram_offset, dbgfs_sram_len;
#endif /* CONFIG_IWLWIFI_DEBUGFS */
#endif /* CONFIG_IWLWIFI_DEBUG */
--
1.6.3.3
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
