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path: root/testing/flashcache-grsec/kernel-3.18.patch
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From 387fce7bf2143b55147ce4822cd68f694c0bc49a Mon Sep 17 00:00:00 2001
From: Mohan Srinivasan <mohan@fb.com>
Date: Mon, 3 Nov 2014 11:57:38 -0800
Subject: [PATCH] 3.17. 3.18 compilation fixes.

Summary:
3.17. 3.18 compilation fixes.

Test Plan:

Reviewers:

CC:

Task ID: #

Blame Rev:
---
 src/flashcache_conf.c   | 32 ++++++++++++++++++++++++++++-
 src/flashcache_procfs.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 85 insertions(+), 1 deletion(-)

diff --git a/src/flashcache_conf.c b/src/flashcache_conf.c
index 36d1e25..ad20539 100644
--- a/src/flashcache_conf.c
+++ b/src/flashcache_conf.c
@@ -91,12 +91,14 @@ static void flashcache_sync_for_remove(struct cache_c *dmc);
 
 extern char *flashcache_sw_version;
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
 static int
 flashcache_wait_schedule(void *unused)
 {
 	schedule();
 	return 0;
 }
+#endif
 
 static int 
 flashcache_jobs_init(void)
@@ -1222,13 +1224,21 @@ flashcache_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 		seq_io_move_to_lruhead(dmc, &dmc->seq_recent_ios[i]);
 	}
 	dmc->seq_io_tail = &dmc->seq_recent_ios[0];
-
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
 	(void)wait_on_bit_lock(&flashcache_control->synch_flags, FLASHCACHE_UPDATE_LIST,
 			       flashcache_wait_schedule, TASK_UNINTERRUPTIBLE);
+#else
+	(void)wait_on_bit_lock(&flashcache_control->synch_flags, FLASHCACHE_UPDATE_LIST,
+			       TASK_UNINTERRUPTIBLE);
+#endif
 	dmc->next_cache = cache_list_head;
 	cache_list_head = dmc;
 	clear_bit(FLASHCACHE_UPDATE_LIST, &flashcache_control->synch_flags);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
 	smp_mb__after_clear_bit();
+#else
+	smp_mb__after_atomic();
+#endif
 	wake_up_bit(&flashcache_control->synch_flags, FLASHCACHE_UPDATE_LIST);
 
 	for (i = 0 ; i < dmc->size ; i++) {
@@ -1438,10 +1448,16 @@ flashcache_dtr(struct dm_target *ti)
 	VERIFY(dmc->num_blacklist_pids == 0);
 	dm_put_device(ti, dmc->disk_dev);
 	dm_put_device(ti, dmc->cache_dev);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
 	(void)wait_on_bit_lock(&flashcache_control->synch_flags, 
 			       FLASHCACHE_UPDATE_LIST,
 			       flashcache_wait_schedule, 
 			       TASK_UNINTERRUPTIBLE);
+#else
+	(void)wait_on_bit_lock(&flashcache_control->synch_flags, 
+			       FLASHCACHE_UPDATE_LIST,
+			       TASK_UNINTERRUPTIBLE);
+#endif
 	nodepp = &cache_list_head;
 	while (*nodepp != NULL) {
 		if (*nodepp == dmc) {
@@ -1451,7 +1467,11 @@ flashcache_dtr(struct dm_target *ti)
 		nodepp = &((*nodepp)->next_cache);
 	}
 	clear_bit(FLASHCACHE_UPDATE_LIST, &flashcache_control->synch_flags);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
 	smp_mb__after_clear_bit();
+#else
+	smp_mb__after_atomic();
+#endif
 	wake_up_bit(&flashcache_control->synch_flags, FLASHCACHE_UPDATE_LIST);
 	kfree(dmc);
 }
@@ -1735,10 +1755,16 @@ flashcache_notify_reboot(struct notifier_block *this,
 {
 	struct cache_c *dmc;
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
 	(void)wait_on_bit_lock(&flashcache_control->synch_flags, 
 			       FLASHCACHE_UPDATE_LIST,
 			       flashcache_wait_schedule, 
 			       TASK_UNINTERRUPTIBLE);
+#else
+	(void)wait_on_bit_lock(&flashcache_control->synch_flags, 
+			       FLASHCACHE_UPDATE_LIST,
+			       TASK_UNINTERRUPTIBLE);
+#endif
 	for (dmc = cache_list_head ; 
 	     dmc != NULL ; 
 	     dmc = dmc->next_cache) {
@@ -1750,7 +1776,11 @@ flashcache_notify_reboot(struct notifier_block *this,
 		}
 	}
 	clear_bit(FLASHCACHE_UPDATE_LIST, &flashcache_control->synch_flags);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
 	smp_mb__after_clear_bit();
+#else
+	smp_mb__after_atomic();
+#endif
 	wake_up_bit(&flashcache_control->synch_flags, FLASHCACHE_UPDATE_LIST);
 	return NOTIFY_DONE;
 }
diff --git a/src/flashcache_procfs.c b/src/flashcache_procfs.c
index 2ff33c0..23c5a81 100644
--- a/src/flashcache_procfs.c
+++ b/src/flashcache_procfs.c
@@ -70,12 +70,18 @@ static char *flashcache_cons_sysctl_devname(struct cache_c *dmc);
 #define FLASHCACHE_PROC_ROOTDIR_NAME	"flashcache"
 
 static int
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+flashcache_io_latency_init(struct ctl_table *table, int write,
+			   void __user *buffer,
+			   size_t *length, loff_t *ppos)
+#else
 flashcache_io_latency_init(ctl_table *table, int write,
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
 			   struct file *file,
 #endif
 			   void __user *buffer,
 			   size_t *length, loff_t *ppos)
+#endif
 {
 	struct cache_c *dmc = (struct cache_c *)table->extra1;
 
@@ -97,12 +103,18 @@ flashcache_io_latency_init(ctl_table *table, int write,
 }
 
 static int 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+flashcache_sync_sysctl(struct ctl_table *table, int write,
+		       void __user *buffer, 
+		       size_t *length, loff_t *ppos)
+#else
 flashcache_sync_sysctl(ctl_table *table, int write,
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
 		       struct file *file, 
 #endif
 		       void __user *buffer, 
 		       size_t *length, loff_t *ppos)
+#endif
 {
 	struct cache_c *dmc = (struct cache_c *)table->extra1;
 
@@ -123,12 +135,18 @@ flashcache_sync_sysctl(ctl_table *table, int write,
 }
 
 static int 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+flashcache_zerostats_sysctl(struct ctl_table *table, int write,
+			    void __user *buffer, 
+			    size_t *length, loff_t *ppos)
+#else
 flashcache_zerostats_sysctl(ctl_table *table, int write,
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
 			    struct file *file, 
 #endif
 			    void __user *buffer, 
 			    size_t *length, loff_t *ppos)
+#endif
 {
 	struct cache_c *dmc = (struct cache_c *)table->extra1;
 
@@ -151,12 +169,18 @@ flashcache_zerostats_sysctl(ctl_table *table, int write,
 }
 
 static int 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+flashcache_fallow_clean_speed_sysctl(struct ctl_table *table, int write,
+				     void __user *buffer, 
+				     size_t *length, loff_t *ppos)
+#else
 flashcache_fallow_clean_speed_sysctl(ctl_table *table, int write,
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
 				     struct file *file, 
 #endif
 				     void __user *buffer, 
 				     size_t *length, loff_t *ppos)
+#endif
 {
 	struct cache_c *dmc = (struct cache_c *)table->extra1;
 
@@ -176,12 +200,18 @@ flashcache_fallow_clean_speed_sysctl(ctl_table *table, int write,
 }
 
 static int
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+flashcache_dirty_thresh_sysctl(struct ctl_table *table, int write,
+			       void __user *buffer, 
+			       size_t *length, loff_t *ppos)
+#else
 flashcache_dirty_thresh_sysctl(ctl_table *table, int write,
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
 			       struct file *file, 
 #endif
 			       void __user *buffer, 
 			       size_t *length, loff_t *ppos)
+#endif
 {
 	struct cache_c *dmc = (struct cache_c *)table->extra1;
 
@@ -204,12 +234,18 @@ flashcache_dirty_thresh_sysctl(ctl_table *table, int write,
 }
 
 static int
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+flashcache_lru_hot_pct_sysctl(struct ctl_table *table, int write,
+			      void __user *buffer, 
+			      size_t *length, loff_t *ppos)
+#else
 flashcache_lru_hot_pct_sysctl(ctl_table *table, int write,
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
 			       struct file *file, 
 #endif
 			       void __user *buffer, 
 			       size_t *length, loff_t *ppos)
+#endif
 {
 	struct cache_c *dmc = (struct cache_c *)table->extra1;
 
@@ -236,10 +272,17 @@ flashcache_lru_hot_pct_sysctl(ctl_table *table, int write,
 
 static struct flashcache_writeback_sysctl_table {
 	struct ctl_table_header *sysctl_header;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+	struct ctl_table	vars[FLASHCACHE_NUM_WRITEBACK_SYSCTLS];
+	struct ctl_table	dev[2];
+	struct ctl_table	dir[2];
+	struct ctl_table	root[2];
+#else
 	ctl_table		vars[FLASHCACHE_NUM_WRITEBACK_SYSCTLS];
 	ctl_table		dev[2];
 	ctl_table		dir[2];
 	ctl_table		root[2];
+#endif
 } flashcache_writeback_sysctl = {
 	.vars = {
 		{
@@ -510,10 +553,17 @@ static struct flashcache_writeback_sysctl_table {
 
 static struct flashcache_writethrough_sysctl_table {
 	struct ctl_table_header *sysctl_header;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+	struct ctl_table	vars[FLASHCACHE_NUM_WRITETHROUGH_SYSCTLS];
+	struct ctl_table	dev[2];
+	struct ctl_table	dir[2];
+	struct ctl_table	root[2];
+#else
 	ctl_table		vars[FLASHCACHE_NUM_WRITETHROUGH_SYSCTLS];
 	ctl_table		dev[2];
 	ctl_table		dir[2];
 	ctl_table		root[2];
+#endif
 } flashcache_writethrough_sysctl = {
 	.vars = {
 		{
@@ -668,7 +718,11 @@ static struct flashcache_writethrough_sysctl_table {
 };
 
 int *
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
+flashcache_find_sysctl_data(struct cache_c *dmc, struct ctl_table *vars)
+#else
 flashcache_find_sysctl_data(struct cache_c *dmc, ctl_table *vars)
+#endif
 {
 	if (strcmp(vars->procname, "io_latency_hist") == 0)
 		return &dmc->sysctl_io_latency_hist;