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libfs: rename simple_attr_close to simple_attr_release
[sfrench/cifs-2.6.git] / arch / powerpc / platforms / cell / spufs / file.c
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 510adc57af9077831709521ae02c83968adf59ef..e393144d533dcf06f988fe841c8a8b527569973a 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -29,6 +29,7 @@
 #include <linux/poll.h>
 #include <linux/ptrace.h>
 #include <linux/seq_file.h>
+#include <linux/marker.h>
 
 #include <asm/io.h>
 #include <asm/semaphore.h>
@@ -198,9 +199,12 @@ spufs_mem_read(struct file *file, char __user *buffer,
        struct spu_context *ctx = file->private_data;
        ssize_t ret;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        ret = __spufs_mem_read(ctx, buffer, size, pos);
        spu_release(ctx);
+
        return ret;
 }
 
@@ -220,7 +224,10 @@ spufs_mem_write(struct file *file, const char __user *buffer,
        if (size > LS_SIZE - pos)
                size = LS_SIZE - pos;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
+
        local_store = ctx->ops->get_ls(ctx);
        ret = copy_from_user(local_store + pos, buffer, size);
        spu_release(ctx);
@@ -260,7 +267,8 @@ static unsigned long spufs_mem_mmap_nopfn(struct vm_area_struct *vma,
        pr_debug("spufs_mem_mmap_nopfn address=0x%lx -> 0x%lx, offset=0x%lx\n",
                 addr0, address, offset);
 
-       spu_acquire(ctx);
+       if (spu_acquire(ctx))
+               return NOPFN_REFAULT;
 
        if (ctx->state == SPU_STATE_SAVED) {
                vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
@@ -351,6 +359,8 @@ static unsigned long spufs_ps_nopfn(struct vm_area_struct *vma,
        struct spu_context *ctx = vma->vm_file->private_data;
        unsigned long area, offset = address - vma->vm_start;
 
+       spu_context_nospu_trace(spufs_ps_nopfn__enter, ctx);
+
        offset += vma->vm_pgoff << PAGE_SHIFT;
        if (offset >= ps_size)
                return NOPFN_SIGBUS;
@@ -363,20 +373,22 @@ static unsigned long spufs_ps_nopfn(struct vm_area_struct *vma,
         * to return NOPFN_REFAULT because the mappings may have
         * hanged.
         */
-       spu_acquire(ctx);
+       if (spu_acquire(ctx))
+               return NOPFN_REFAULT;
+
        if (ctx->state == SPU_STATE_SAVED) {
                up_read(&current->mm->mmap_sem);
+               spu_context_nospu_trace(spufs_ps_nopfn__sleep, ctx);
                spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
+               spu_context_trace(spufs_ps_nopfn__wake, ctx, ctx->spu);
                down_read(&current->mm->mmap_sem);
-               goto out;
+       } else {
+               area = ctx->spu->problem_phys + ps_offs;
+               vm_insert_pfn(vma, address, (area + offset) >> PAGE_SHIFT);
+               spu_context_trace(spufs_ps_nopfn__insert, ctx, ctx->spu);
        }
 
-       area = ctx->spu->problem_phys + ps_offs;
-       vm_insert_pfn(vma, address, (area + offset) >> PAGE_SHIFT);
-
-out:
        spu_release(ctx);
-
        return NOPFN_REFAULT;
 }
 
@@ -413,8 +425,11 @@ static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
 static int spufs_cntl_get(void *data, u64 *val)
 {
        struct spu_context *ctx = data;
+       int ret;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        *val = ctx->ops->status_read(ctx);
        spu_release(ctx);
 
@@ -424,8 +439,11 @@ static int spufs_cntl_get(void *data, u64 *val)
 static int spufs_cntl_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
+       int ret;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        ctx->ops->runcntl_write(ctx, val);
        spu_release(ctx);
 
@@ -442,7 +460,7 @@ static int spufs_cntl_open(struct inode *inode, struct file *file)
        if (!i->i_openers++)
                ctx->cntl = inode->i_mapping;
        mutex_unlock(&ctx->mapping_lock);
-       return spufs_attr_open(inode, file, spufs_cntl_get,
+       return simple_attr_open(inode, file, spufs_cntl_get,
                                        spufs_cntl_set, "0x%08lx");
 }
 
@@ -452,7 +470,7 @@ spufs_cntl_release(struct inode *inode, struct file *file)
        struct spufs_inode_info *i = SPUFS_I(inode);
        struct spu_context *ctx = i->i_ctx;
 
-       spufs_attr_release(inode, file);
+       simple_attr_release(inode, file);
 
        mutex_lock(&ctx->mapping_lock);
        if (!--i->i_openers)
@@ -464,8 +482,8 @@ spufs_cntl_release(struct inode *inode, struct file *file)
 static const struct file_operations spufs_cntl_fops = {
        .open = spufs_cntl_open,
        .release = spufs_cntl_release,
-       .read = spufs_attr_read,
-       .write = spufs_attr_write,
+       .read = simple_attr_read,
+       .write = simple_attr_write,
        .mmap = spufs_cntl_mmap,
 };
 
@@ -493,7 +511,9 @@ spufs_regs_read(struct file *file, char __user *buffer,
        int ret;
        struct spu_context *ctx = file->private_data;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        ret = __spufs_regs_read(ctx, buffer, size, pos);
        spu_release_saved(ctx);
        return ret;
@@ -512,7 +532,9 @@ spufs_regs_write(struct file *file, const char __user *buffer,
                return -EFBIG;
        *pos += size;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
 
        ret = copy_from_user(lscsa->gprs + *pos - size,
                             buffer, size) ? -EFAULT : size;
@@ -544,7 +566,9 @@ spufs_fpcr_read(struct file *file, char __user * buffer,
        int ret;
        struct spu_context *ctx = file->private_data;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        ret = __spufs_fpcr_read(ctx, buffer, size, pos);
        spu_release_saved(ctx);
        return ret;
@@ -561,10 +585,12 @@ spufs_fpcr_write(struct file *file, const char __user * buffer,
        size = min_t(ssize_t, sizeof(lscsa->fpcr) - *pos, size);
        if (size <= 0)
                return -EFBIG;
-       *pos += size;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
 
+       *pos += size;
        ret = copy_from_user((char *)&lscsa->fpcr + *pos - size,
                             buffer, size) ? -EFAULT : size;
 
@@ -611,7 +637,10 @@ static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
 
        udata = (void __user *)buf;
 
-       spu_acquire(ctx);
+       count = spu_acquire(ctx);
+       if (count)
+               return count;
+
        for (count = 0; (count + 4) <= len; count += 4, udata++) {
                int ret;
                ret = ctx->ops->mbox_read(ctx, &mbox_data);
@@ -647,12 +676,15 @@ static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf,
                        size_t len, loff_t *pos)
 {
        struct spu_context *ctx = file->private_data;
+       ssize_t ret;
        u32 mbox_stat;
 
        if (len < 4)
                return -EINVAL;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
 
        mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff;
 
@@ -721,7 +753,9 @@ static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
 
        udata = (void __user *)buf;
 
-       spu_acquire(ctx);
+       count = spu_acquire(ctx);
+       if (count)
+               return count;
 
        /* wait only for the first element */
        count = 0;
@@ -767,7 +801,11 @@ static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
 
        poll_wait(file, &ctx->ibox_wq, wait);
 
-       spu_acquire(ctx);
+       /*
+        * For now keep this uninterruptible and also ignore the rule
+        * that poll should not sleep.  Will be fixed later.
+        */
+       mutex_lock(&ctx->state_mutex);
        mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM);
        spu_release(ctx);
 
@@ -785,12 +823,15 @@ static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf,
                        size_t len, loff_t *pos)
 {
        struct spu_context *ctx = file->private_data;
+       ssize_t ret;
        u32 ibox_stat;
 
        if (len < 4)
                return -EINVAL;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff;
        spu_release(ctx);
 
@@ -862,7 +903,9 @@ static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
        if (__get_user(wbox_data, udata))
                return -EFAULT;
 
-       spu_acquire(ctx);
+       count = spu_acquire(ctx);
+       if (count)
+               return count;
 
        /*
         * make sure we can at least write one element, by waiting
@@ -903,7 +946,11 @@ static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
 
        poll_wait(file, &ctx->wbox_wq, wait);
 
-       spu_acquire(ctx);
+       /*
+        * For now keep this uninterruptible and also ignore the rule
+        * that poll should not sleep.  Will be fixed later.
+        */
+       mutex_lock(&ctx->state_mutex);
        mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM);
        spu_release(ctx);
 
@@ -921,12 +968,15 @@ static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf,
                        size_t len, loff_t *pos)
 {
        struct spu_context *ctx = file->private_data;
+       ssize_t ret;
        u32 wbox_stat;
 
        if (len < 4)
                return -EINVAL;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff;
        spu_release(ctx);
 
@@ -997,7 +1047,9 @@ static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
        int ret;
        struct spu_context *ctx = file->private_data;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        ret = __spufs_signal1_read(ctx, buf, len, pos);
        spu_release_saved(ctx);
 
@@ -1008,6 +1060,7 @@ static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
                        size_t len, loff_t *pos)
 {
        struct spu_context *ctx;
+       ssize_t ret;
        u32 data;
 
        ctx = file->private_data;
@@ -1018,7 +1071,9 @@ static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
        if (copy_from_user(&data, buf, 4))
                return -EFAULT;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        ctx->ops->signal1_write(ctx, data);
        spu_release(ctx);
 
@@ -1128,7 +1183,9 @@ static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
        struct spu_context *ctx = file->private_data;
        int ret;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        ret = __spufs_signal2_read(ctx, buf, len, pos);
        spu_release_saved(ctx);
 
@@ -1139,6 +1196,7 @@ static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
                        size_t len, loff_t *pos)
 {
        struct spu_context *ctx;
+       ssize_t ret;
        u32 data;
 
        ctx = file->private_data;
@@ -1149,7 +1207,9 @@ static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
        if (copy_from_user(&data, buf, 4))
                return -EFAULT;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        ctx->ops->signal2_write(ctx, data);
        spu_release(ctx);
 
@@ -1220,13 +1280,18 @@ static const struct file_operations spufs_signal2_nosched_fops = {
 static int __##__get(void *data, u64 *val)                             \
 {                                                                      \
        struct spu_context *ctx = data;                                 \
+       int ret = 0;                                                    \
                                                                        \
        if (__acquire == SPU_ATTR_ACQUIRE) {                            \
-               spu_acquire(ctx);                                       \
+               ret = spu_acquire(ctx);                                 \
+               if (ret)                                                \
+                       return ret;                                     \
                *val = __get(ctx);                                      \
                spu_release(ctx);                                       \
        } else if (__acquire == SPU_ATTR_ACQUIRE_SAVED) {               \
-               spu_acquire_saved(ctx);                                 \
+               ret = spu_acquire_saved(ctx);                           \
+               if (ret)                                                \
+                       return ret;                                     \
                *val = __get(ctx);                                      \
                spu_release_saved(ctx);                                 \
        } else                                                          \
@@ -1239,8 +1304,11 @@ DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__name, __##__get, __set, __fmt);
 static int spufs_signal1_type_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
+       int ret;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        ctx->ops->signal1_type_set(ctx, val);
        spu_release(ctx);
 
@@ -1258,8 +1326,11 @@ DEFINE_SPUFS_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
 static int spufs_signal2_type_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
+       int ret;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        ctx->ops->signal2_type_set(ctx, val);
        spu_release(ctx);
 
@@ -1512,12 +1583,17 @@ static ssize_t spufs_mfc_read(struct file *file, char __user *buffer,
        if (size != 4)
                goto out;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
+
+       ret = -EINVAL;
        if (file->f_flags & O_NONBLOCK) {
                status = ctx->ops->read_mfc_tagstatus(ctx);
                if (!(status & ctx->tagwait))
                        ret = -EAGAIN;
                else
+                       /* XXX(hch): shouldn't we clear ret here? */
                        ctx->tagwait &= ~status;
        } else {
                ret = spufs_wait(ctx->mfc_wq,
@@ -1642,7 +1718,10 @@ static ssize_t spufs_mfc_write(struct file *file, const char __user *buffer,
        if (ret)
                goto out;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               goto out;
+
        ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
        if (ret)
                goto out;
@@ -1677,7 +1756,11 @@ static unsigned int spufs_mfc_poll(struct file *file,poll_table *wait)
 
        poll_wait(file, &ctx->mfc_wq, wait);
 
-       spu_acquire(ctx);
+       /*
+        * For now keep this uninterruptible and also ignore the rule
+        * that poll should not sleep.  Will be fixed later.
+        */
+       mutex_lock(&ctx->state_mutex);
        ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2);
        free_elements = ctx->ops->get_mfc_free_elements(ctx);
        tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
@@ -1700,7 +1783,9 @@ static int spufs_mfc_flush(struct file *file, fl_owner_t id)
        struct spu_context *ctx = file->private_data;
        int ret;
 
-       spu_acquire(ctx);
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
 #if 0
 /* this currently hangs */
        ret = spufs_wait(ctx->mfc_wq,
@@ -1746,7 +1831,11 @@ static const struct file_operations spufs_mfc_fops = {
 static int spufs_npc_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
-       spu_acquire(ctx);
+       int ret;
+
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
        ctx->ops->npc_write(ctx, val);
        spu_release(ctx);
 
@@ -1764,7 +1853,11 @@ static int spufs_decr_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
        struct spu_lscsa *lscsa = ctx->csa.lscsa;
-       spu_acquire_saved(ctx);
+       int ret;
+
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        lscsa->decr.slot[0] = (u32) val;
        spu_release_saved(ctx);
 
@@ -1782,7 +1875,11 @@ DEFINE_SPUFS_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set,
 static int spufs_decr_status_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
-       spu_acquire_saved(ctx);
+       int ret;
+
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        if (val)
                ctx->csa.priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING;
        else
@@ -1807,7 +1904,11 @@ static int spufs_event_mask_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
        struct spu_lscsa *lscsa = ctx->csa.lscsa;
-       spu_acquire_saved(ctx);
+       int ret;
+
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        lscsa->event_mask.slot[0] = (u32) val;
        spu_release_saved(ctx);
 
@@ -1840,7 +1941,11 @@ static int spufs_srr0_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
        struct spu_lscsa *lscsa = ctx->csa.lscsa;
-       spu_acquire_saved(ctx);
+       int ret;
+
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        lscsa->srr0.slot[0] = (u32) val;
        spu_release_saved(ctx);
 
@@ -1927,13 +2032,13 @@ static const struct file_operations spufs_caps_fops = {
 static ssize_t __spufs_mbox_info_read(struct spu_context *ctx,
                        char __user *buf, size_t len, loff_t *pos)
 {
-       u32 mbox_stat;
        u32 data;
 
-       mbox_stat = ctx->csa.prob.mb_stat_R;
-       if (mbox_stat & 0x0000ff) {
-               data = ctx->csa.prob.pu_mb_R;
-       }
+       /* EOF if there's no entry in the mbox */
+       if (!(ctx->csa.prob.mb_stat_R & 0x0000ff))
+               return 0;
+
+       data = ctx->csa.prob.pu_mb_R;
 
        return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
 }
@@ -1947,7 +2052,9 @@ static ssize_t spufs_mbox_info_read(struct file *file, char __user *buf,
        if (!access_ok(VERIFY_WRITE, buf, len))
                return -EFAULT;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        spin_lock(&ctx->csa.register_lock);
        ret = __spufs_mbox_info_read(ctx, buf, len, pos);
        spin_unlock(&ctx->csa.register_lock);
@@ -1965,13 +2072,13 @@ static const struct file_operations spufs_mbox_info_fops = {
 static ssize_t __spufs_ibox_info_read(struct spu_context *ctx,
                                char __user *buf, size_t len, loff_t *pos)
 {
-       u32 ibox_stat;
        u32 data;
 
-       ibox_stat = ctx->csa.prob.mb_stat_R;
-       if (ibox_stat & 0xff0000) {
-               data = ctx->csa.priv2.puint_mb_R;
-       }
+       /* EOF if there's no entry in the ibox */
+       if (!(ctx->csa.prob.mb_stat_R & 0xff0000))
+               return 0;
+
+       data = ctx->csa.priv2.puint_mb_R;
 
        return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
 }
@@ -1985,7 +2092,9 @@ static ssize_t spufs_ibox_info_read(struct file *file, char __user *buf,
        if (!access_ok(VERIFY_WRITE, buf, len))
                return -EFAULT;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        spin_lock(&ctx->csa.register_lock);
        ret = __spufs_ibox_info_read(ctx, buf, len, pos);
        spin_unlock(&ctx->csa.register_lock);
@@ -2026,7 +2135,9 @@ static ssize_t spufs_wbox_info_read(struct file *file, char __user *buf,
        if (!access_ok(VERIFY_WRITE, buf, len))
                return -EFAULT;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        spin_lock(&ctx->csa.register_lock);
        ret = __spufs_wbox_info_read(ctx, buf, len, pos);
        spin_unlock(&ctx->csa.register_lock);
@@ -2076,7 +2187,9 @@ static ssize_t spufs_dma_info_read(struct file *file, char __user *buf,
        if (!access_ok(VERIFY_WRITE, buf, len))
                return -EFAULT;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        spin_lock(&ctx->csa.register_lock);
        ret = __spufs_dma_info_read(ctx, buf, len, pos);
        spin_unlock(&ctx->csa.register_lock);
@@ -2127,7 +2240,9 @@ static ssize_t spufs_proxydma_info_read(struct file *file, char __user *buf,
        struct spu_context *ctx = file->private_data;
        int ret;
 
-       spu_acquire_saved(ctx);
+       ret = spu_acquire_saved(ctx);
+       if (ret)
+               return ret;
        spin_lock(&ctx->csa.register_lock);
        ret = __spufs_proxydma_info_read(ctx, buf, len, pos);
        spin_unlock(&ctx->csa.register_lock);
@@ -2216,8 +2331,12 @@ static unsigned long long spufs_class2_intrs(struct spu_context *ctx)
 static int spufs_show_stat(struct seq_file *s, void *private)
 {
        struct spu_context *ctx = s->private;
+       int ret;
+
+       ret = spu_acquire(ctx);
+       if (ret)
+               return ret;
 
-       spu_acquire(ctx);
        seq_printf(s, "%s %llu %llu %llu %llu "
                      "%llu %llu %llu %llu %llu %llu %llu %llu\n",
                ctx_state_names[ctx->stats.util_state],
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