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Message-Id: <20180731202448.229487-9-toddpoynor@gmail.com>
Date: Tue, 31 Jul 2018 13:24:41 -0700
From: Todd Poynor <toddpoynor@...il.com>
To: Rob Springer <rspringer@...gle.com>,
John Joseph <jnjoseph@...gle.com>,
Ben Chan <benchan@...omium.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Dmitry Torokhov <dtor@...omium.org>, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org, Todd Poynor <toddpoynor@...gle.com>
Subject: [PATCH 08/15] staging: gasket: page table: fix function param line continuation style
From: Todd Poynor <toddpoynor@...gle.com>
Fix multi-line alignment formatting to look like:
int ret = long_function_name(device, VARIABLE1, VARIABLE2,
VARIABLE3, VARIABLE4);
Many of these TODO items were previously cleaned up during the conversion
to standard logging functions.
Signed-off-by: Todd Poynor <toddpoynor@...gle.com>
---
drivers/staging/gasket/gasket_page_table.c | 206 +++++++++++----------
drivers/staging/gasket/gasket_page_table.h | 33 ++--
2 files changed, 120 insertions(+), 119 deletions(-)
diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c
index aa036b2e8193..13e1d0952a47 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -215,11 +215,10 @@ struct gasket_page_table {
};
/* See gasket_page_table.h for description. */
-int gasket_page_table_init(
- struct gasket_page_table **ppg_tbl,
- const struct gasket_bar_data *bar_data,
- const struct gasket_page_table_config *page_table_config,
- struct device *device, struct pci_dev *pci_dev)
+int gasket_page_table_init(struct gasket_page_table **ppg_tbl,
+ const struct gasket_bar_data *bar_data,
+ const struct gasket_page_table_config *page_table_config,
+ struct device *device, struct pci_dev *pci_dev)
{
ulong bytes;
struct gasket_page_table *pg_tbl;
@@ -276,10 +275,10 @@ int gasket_page_table_init(
pg_tbl->extended_flag = 0;
}
pg_tbl->num_active_pages = 0;
- pg_tbl->base_slot = (u64 __iomem *)&(
- bar_data->virt_base[page_table_config->base_reg]);
- pg_tbl->extended_offset_reg = (u64 __iomem *)&(
- bar_data->virt_base[page_table_config->extended_reg]);
+ pg_tbl->base_slot =
+ (u64 __iomem *)&bar_data->virt_base[page_table_config->base_reg];
+ pg_tbl->extended_offset_reg =
+ (u64 __iomem *)&bar_data->virt_base[page_table_config->extended_reg];
pg_tbl->device = get_device(device);
pg_tbl->pci_dev = pci_dev_get(pci_dev);
@@ -292,8 +291,8 @@ int gasket_page_table_init(
* Check if a range of PTEs is free.
* The page table mutex must be held by the caller.
*/
-static bool gasket_is_pte_range_free(
- struct gasket_page_table_entry *ptes, uint num_entries)
+static bool gasket_is_pte_range_free(struct gasket_page_table_entry *ptes,
+ uint num_entries)
{
int i;
@@ -309,9 +308,9 @@ static bool gasket_is_pte_range_free(
* Free a second level page [sub]table.
* The page table mutex must be held before this call.
*/
-static void gasket_free_extended_subtable(
- struct gasket_page_table *pg_tbl, struct gasket_page_table_entry *pte,
- u64 __iomem *slot)
+static void gasket_free_extended_subtable(struct gasket_page_table *pg_tbl,
+ struct gasket_page_table_entry *pte,
+ u64 __iomem *slot)
{
/* Release the page table from the driver */
pte->status = PTE_FREE;
@@ -337,8 +336,8 @@ static void gasket_free_extended_subtable(
* Actually perform collection.
* The page table mutex must be held by the caller.
*/
-static void gasket_page_table_garbage_collect_nolock(
- struct gasket_page_table *pg_tbl)
+static void
+gasket_page_table_garbage_collect_nolock(struct gasket_page_table *pg_tbl)
{
struct gasket_page_table_entry *pte;
u64 __iomem *slot;
@@ -351,10 +350,10 @@ static void gasket_page_table_garbage_collect_nolock(
pte < pg_tbl->entries + pg_tbl->config.total_entries;
pte++, slot++) {
if (pte->status == PTE_INUSE) {
- if (gasket_is_pte_range_free(
- pte->sublevel, GASKET_PAGES_PER_SUBTABLE))
- gasket_free_extended_subtable(
- pg_tbl, pte, slot);
+ if (gasket_is_pte_range_free(pte->sublevel,
+ GASKET_PAGES_PER_SUBTABLE))
+ gasket_free_extended_subtable(pg_tbl, pte,
+ slot);
}
}
}
@@ -384,8 +383,8 @@ void gasket_page_table_cleanup(struct gasket_page_table *pg_tbl)
}
/* See gasket_page_table.h for description. */
-int gasket_page_table_partition(
- struct gasket_page_table *pg_tbl, uint num_simple_entries)
+int gasket_page_table_partition(struct gasket_page_table *pg_tbl,
+ uint num_simple_entries)
{
int i, start;
@@ -445,10 +444,10 @@ static int is_coherent(struct gasket_page_table *pg_tbl, ulong host_addr)
* an extended mapping, these will be within a second-level page table
* allocated by the host and so must have their __iomem attribute casted away.
*/
-static int gasket_perform_mapping(
- struct gasket_page_table *pg_tbl, struct gasket_page_table_entry *ptes,
- u64 __iomem *slots, ulong host_addr, uint num_pages,
- int is_simple_mapping)
+static int gasket_perform_mapping(struct gasket_page_table *pg_tbl,
+ struct gasket_page_table_entry *ptes,
+ u64 __iomem *slots, ulong host_addr,
+ uint num_pages, int is_simple_mapping)
{
int ret;
ulong offset;
@@ -470,8 +469,8 @@ static int gasket_perform_mapping(
ptes[i].dma_addr = pg_tbl->coherent_pages[0].paddr +
off + i * PAGE_SIZE;
} else {
- ret = get_user_pages_fast(
- page_addr - offset, 1, 1, &page);
+ ret = get_user_pages_fast(page_addr - offset, 1, 1,
+ &page);
if (ret <= 0) {
dev_err(pg_tbl->device,
@@ -532,8 +531,8 @@ static int gasket_perform_mapping(
* Return the index of the page for the address in the simple table.
* Does not perform validity checking.
*/
-static int gasket_simple_page_idx(
- struct gasket_page_table *pg_tbl, ulong dev_addr)
+static int gasket_simple_page_idx(struct gasket_page_table *pg_tbl,
+ ulong dev_addr)
{
return (dev_addr >> GASKET_SIMPLE_PAGE_SHIFT) &
(pg_tbl->config.total_entries - 1);
@@ -543,8 +542,8 @@ static int gasket_simple_page_idx(
* Return the level 0 page index for the given address.
* Does not perform validity checking.
*/
-static ulong gasket_extended_lvl0_page_idx(
- struct gasket_page_table *pg_tbl, ulong dev_addr)
+static ulong gasket_extended_lvl0_page_idx(struct gasket_page_table *pg_tbl,
+ ulong dev_addr)
{
return (dev_addr >> GASKET_EXTENDED_LVL0_SHIFT) &
((1 << GASKET_EXTENDED_LVL0_WIDTH) - 1);
@@ -554,8 +553,8 @@ static ulong gasket_extended_lvl0_page_idx(
* Return the level 1 page index for the given address.
* Does not perform validity checking.
*/
-static ulong gasket_extended_lvl1_page_idx(
- struct gasket_page_table *pg_tbl, ulong dev_addr)
+static ulong gasket_extended_lvl1_page_idx(struct gasket_page_table *pg_tbl,
+ ulong dev_addr)
{
return (dev_addr >> GASKET_EXTENDED_LVL1_SHIFT) &
(GASKET_PAGES_PER_SUBTABLE - 1);
@@ -565,12 +564,12 @@ static ulong gasket_extended_lvl1_page_idx(
* Allocate page table entries in a simple table.
* The page table mutex must be held by the caller.
*/
-static int gasket_alloc_simple_entries(
- struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages)
+static int gasket_alloc_simple_entries(struct gasket_page_table *pg_tbl,
+ ulong dev_addr, uint num_pages)
{
- if (!gasket_is_pte_range_free(
- pg_tbl->entries + gasket_simple_page_idx(pg_tbl, dev_addr),
- num_pages))
+ if (!gasket_is_pte_range_free(pg_tbl->entries +
+ gasket_simple_page_idx(pg_tbl, dev_addr),
+ num_pages))
return -EBUSY;
return 0;
@@ -593,9 +592,10 @@ static bool gasket_release_page(struct page *page)
* Unmap and release mapped pages.
* The page table mutex must be held by the caller.
*/
-static void gasket_perform_unmapping(
- struct gasket_page_table *pg_tbl, struct gasket_page_table_entry *ptes,
- u64 __iomem *slots, uint num_pages, int is_simple_mapping)
+static void gasket_perform_unmapping(struct gasket_page_table *pg_tbl,
+ struct gasket_page_table_entry *ptes,
+ u64 __iomem *slots, uint num_pages,
+ int is_simple_mapping)
{
int i;
/*
@@ -631,8 +631,8 @@ static void gasket_perform_unmapping(
* Unmap and release pages mapped to simple addresses.
* The page table mutex must be held by the caller.
*/
-static void gasket_unmap_simple_pages(
- struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages)
+static void gasket_unmap_simple_pages(struct gasket_page_table *pg_tbl,
+ ulong dev_addr, uint num_pages)
{
uint slot = gasket_simple_page_idx(pg_tbl, dev_addr);
@@ -644,8 +644,8 @@ static void gasket_unmap_simple_pages(
* Unmap and release buffers to extended addresses.
* The page table mutex must be held by the caller.
*/
-static void gasket_unmap_extended_pages(
- struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages)
+static void gasket_unmap_extended_pages(struct gasket_page_table *pg_tbl,
+ ulong dev_addr, uint num_pages)
{
uint slot_idx, remain, len;
struct gasket_page_table_entry *pte;
@@ -663,9 +663,9 @@ static void gasket_unmap_extended_pages(
if (pte->status == PTE_INUSE) {
slot_base = (u64 __iomem *)(page_address(pte->page) +
pte->offset);
- gasket_perform_unmapping(
- pg_tbl, pte->sublevel + slot_idx,
- slot_base + slot_idx, len, 0);
+ gasket_perform_unmapping(pg_tbl,
+ pte->sublevel + slot_idx,
+ slot_base + slot_idx, len, 0);
}
remain -= len;
@@ -675,8 +675,8 @@ static void gasket_unmap_extended_pages(
}
/* Evaluates to nonzero if the specified virtual address is simple. */
-static inline bool gasket_addr_is_simple(
- struct gasket_page_table *pg_tbl, ulong addr)
+static inline bool gasket_addr_is_simple(struct gasket_page_table *pg_tbl,
+ ulong addr)
{
return !((addr) & (pg_tbl)->extended_flag);
}
@@ -693,9 +693,9 @@ static inline bool gasket_addr_is_simple(
* Extended page 1000, offset 511:
* Input (1, 1000, 512), Output 0x8003E81FF
*/
-static ulong gasket_components_to_dev_address(
- struct gasket_page_table *pg_tbl, int is_simple, uint page_index,
- uint offset)
+static ulong gasket_components_to_dev_address(struct gasket_page_table *pg_tbl,
+ int is_simple, uint page_index,
+ uint offset)
{
ulong lvl0_index, lvl1_index;
@@ -726,15 +726,15 @@ static ulong gasket_components_to_dev_address(
* and that the requested page range starts and ends within the set of
* currently-partitioned simple pages.
*/
-static bool gasket_is_simple_dev_addr_bad(
- struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages)
+static bool gasket_is_simple_dev_addr_bad(struct gasket_page_table *pg_tbl,
+ ulong dev_addr, uint num_pages)
{
ulong page_offset = dev_addr & (PAGE_SIZE - 1);
ulong page_index =
(dev_addr / PAGE_SIZE) & (pg_tbl->config.total_entries - 1);
- if (gasket_components_to_dev_address(
- pg_tbl, 1, page_index, page_offset) != dev_addr) {
+ if (gasket_components_to_dev_address(pg_tbl, 1, page_index,
+ page_offset) != dev_addr) {
dev_err(pg_tbl->device, "address is invalid, 0x%lX\n",
dev_addr);
return true;
@@ -764,8 +764,8 @@ static bool gasket_is_simple_dev_addr_bad(
* offset) and that the requested page range starts and ends within the set of
* currently-partitioned extended pages.
*/
-static bool gasket_is_extended_dev_addr_bad(
- struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages)
+static bool gasket_is_extended_dev_addr_bad(struct gasket_page_table *pg_tbl,
+ ulong dev_addr, uint num_pages)
{
/* Starting byte index of dev_addr into the first mapped page */
ulong page_offset = dev_addr & (PAGE_SIZE - 1);
@@ -792,8 +792,8 @@ static bool gasket_is_extended_dev_addr_bad(
num_lvl0_pages = (num_pages + GASKET_PAGES_PER_SUBTABLE - 1) /
GASKET_PAGES_PER_SUBTABLE;
- if (gasket_components_to_dev_address(
- pg_tbl, 0, page_global_idx, page_offset) != dev_addr) {
+ if (gasket_components_to_dev_address(pg_tbl, 0, page_global_idx,
+ page_offset) != dev_addr) {
dev_err(pg_tbl->device, "address is invalid: 0x%lx\n",
dev_addr);
return true;
@@ -821,8 +821,8 @@ static bool gasket_is_extended_dev_addr_bad(
* Non-locking entry to unmapping routines.
* The page table mutex must be held by the caller.
*/
-static void gasket_page_table_unmap_nolock(
- struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages)
+static void gasket_page_table_unmap_nolock(struct gasket_page_table *pg_tbl,
+ ulong dev_addr, uint num_pages)
{
if (!num_pages)
return;
@@ -837,9 +837,9 @@ static void gasket_page_table_unmap_nolock(
* Allocate and map pages to simple addresses.
* If there is an error, no pages are mapped.
*/
-static int gasket_map_simple_pages(
- struct gasket_page_table *pg_tbl, ulong host_addr, ulong dev_addr,
- uint num_pages)
+static int gasket_map_simple_pages(struct gasket_page_table *pg_tbl,
+ ulong host_addr, ulong dev_addr,
+ uint num_pages)
{
int ret;
uint slot_idx = gasket_simple_page_idx(pg_tbl, dev_addr);
@@ -852,9 +852,9 @@ static int gasket_map_simple_pages(
return ret;
}
- ret = gasket_perform_mapping(
- pg_tbl, pg_tbl->entries + slot_idx,
- pg_tbl->base_slot + slot_idx, host_addr, num_pages, 1);
+ ret = gasket_perform_mapping(pg_tbl, pg_tbl->entries + slot_idx,
+ pg_tbl->base_slot + slot_idx, host_addr,
+ num_pages, 1);
if (ret) {
gasket_page_table_unmap_nolock(pg_tbl, dev_addr, num_pages);
@@ -867,9 +867,9 @@ static int gasket_map_simple_pages(
* Allocate a second level page table.
* The page table mutex must be held by the caller.
*/
-static int gasket_alloc_extended_subtable(
- struct gasket_page_table *pg_tbl, struct gasket_page_table_entry *pte,
- u64 __iomem *slot)
+static int gasket_alloc_extended_subtable(struct gasket_page_table *pg_tbl,
+ struct gasket_page_table_entry *pte,
+ u64 __iomem *slot)
{
ulong page_addr, subtable_bytes;
dma_addr_t dma_addr;
@@ -924,8 +924,8 @@ static int gasket_alloc_extended_subtable(
*
* The page table mutex must be held by the caller.
*/
-static int gasket_alloc_extended_entries(
- struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_entries)
+static int gasket_alloc_extended_entries(struct gasket_page_table *pg_tbl,
+ ulong dev_addr, uint num_entries)
{
int ret = 0;
uint remain, subtable_slot_idx, len;
@@ -951,8 +951,8 @@ static int gasket_alloc_extended_entries(
return ret;
}
} else {
- if (!gasket_is_pte_range_free(
- pte->sublevel + subtable_slot_idx, len))
+ if (!gasket_is_pte_range_free(pte->sublevel +
+ subtable_slot_idx, len))
return -EBUSY;
}
@@ -969,9 +969,9 @@ static int gasket_alloc_extended_entries(
* gasket_map_extended_pages - Get and map buffers to extended addresses.
* If there is an error, no pages are mapped.
*/
-static int gasket_map_extended_pages(
- struct gasket_page_table *pg_tbl, ulong host_addr, ulong dev_addr,
- uint num_pages)
+static int gasket_map_extended_pages(struct gasket_page_table *pg_tbl,
+ ulong host_addr, ulong dev_addr,
+ uint num_pages)
{
int ret;
ulong dev_addr_end;
@@ -1003,12 +1003,12 @@ static int gasket_map_extended_pages(
slot_base =
(u64 __iomem *)(page_address(pte->page) + pte->offset);
- ret = gasket_perform_mapping(
- pg_tbl, pte->sublevel + slot_idx, slot_base + slot_idx,
- host_addr, len, 0);
+ ret = gasket_perform_mapping(pg_tbl, pte->sublevel + slot_idx,
+ slot_base + slot_idx, host_addr,
+ len, 0);
if (ret) {
- gasket_page_table_unmap_nolock(
- pg_tbl, dev_addr, num_pages);
+ gasket_page_table_unmap_nolock(pg_tbl, dev_addr,
+ num_pages);
return ret;
}
@@ -1029,9 +1029,8 @@ static int gasket_map_extended_pages(
*
* The page table mutex is held for the entire operation.
*/
-int gasket_page_table_map(
- struct gasket_page_table *pg_tbl, ulong host_addr, ulong dev_addr,
- uint num_pages)
+int gasket_page_table_map(struct gasket_page_table *pg_tbl, ulong host_addr,
+ ulong dev_addr, uint num_pages)
{
int ret;
@@ -1041,11 +1040,11 @@ int gasket_page_table_map(
mutex_lock(&pg_tbl->mutex);
if (gasket_addr_is_simple(pg_tbl, dev_addr)) {
- ret = gasket_map_simple_pages(
- pg_tbl, host_addr, dev_addr, num_pages);
+ ret = gasket_map_simple_pages(pg_tbl, host_addr, dev_addr,
+ num_pages);
} else {
- ret = gasket_map_extended_pages(
- pg_tbl, host_addr, dev_addr, num_pages);
+ ret = gasket_map_extended_pages(pg_tbl, host_addr, dev_addr,
+ num_pages);
}
mutex_unlock(&pg_tbl->mutex);
@@ -1067,8 +1066,8 @@ EXPORT_SYMBOL(gasket_page_table_map);
*
* The page table mutex is held for the entire operation.
*/
-void gasket_page_table_unmap(
- struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages)
+void gasket_page_table_unmap(struct gasket_page_table *pg_tbl, ulong dev_addr,
+ uint num_pages)
{
if (!num_pages)
return;
@@ -1081,12 +1080,15 @@ EXPORT_SYMBOL(gasket_page_table_unmap);
static void gasket_page_table_unmap_all_nolock(struct gasket_page_table *pg_tbl)
{
- gasket_unmap_simple_pages(
- pg_tbl, gasket_components_to_dev_address(pg_tbl, 1, 0, 0),
- pg_tbl->num_simple_entries);
- gasket_unmap_extended_pages(
- pg_tbl, gasket_components_to_dev_address(pg_tbl, 0, 0, 0),
- pg_tbl->num_extended_entries * GASKET_PAGES_PER_SUBTABLE);
+ gasket_unmap_simple_pages(pg_tbl,
+ gasket_components_to_dev_address(pg_tbl, 1, 0,
+ 0),
+ pg_tbl->num_simple_entries);
+ gasket_unmap_extended_pages(pg_tbl,
+ gasket_components_to_dev_address(pg_tbl, 0,
+ 0, 0),
+ pg_tbl->num_extended_entries *
+ GASKET_PAGES_PER_SUBTABLE);
}
/* See gasket_page_table.h for description. */
@@ -1189,8 +1191,8 @@ bool gasket_page_table_is_dev_addr_bad(
}
if (gasket_addr_is_simple(pg_tbl, dev_addr))
- return gasket_is_simple_dev_addr_bad(
- pg_tbl, dev_addr, num_pages);
+ return gasket_is_simple_dev_addr_bad(pg_tbl, dev_addr,
+ num_pages);
return gasket_is_extended_dev_addr_bad(pg_tbl, dev_addr, num_pages);
}
EXPORT_SYMBOL(gasket_page_table_is_dev_addr_bad);
diff --git a/drivers/staging/gasket/gasket_page_table.h b/drivers/staging/gasket/gasket_page_table.h
index 765588649365..00c06f050eb9 100644
--- a/drivers/staging/gasket/gasket_page_table.h
+++ b/drivers/staging/gasket/gasket_page_table.h
@@ -46,11 +46,10 @@ struct gasket_page_table;
*
* Returns 0 on success, a negative error code otherwise.
*/
-int gasket_page_table_init(
- struct gasket_page_table **ppg_tbl,
- const struct gasket_bar_data *bar_data,
- const struct gasket_page_table_config *page_table_config,
- struct device *device, struct pci_dev *pci_dev);
+int gasket_page_table_init(struct gasket_page_table **ppg_tbl,
+ const struct gasket_bar_data *bar_data,
+ const struct gasket_page_table_config *page_table_config,
+ struct device *device, struct pci_dev *pci_dev);
/*
* Deallocate and cleanup page table data.
@@ -77,8 +76,8 @@ void gasket_page_table_cleanup(struct gasket_page_table *page_table);
* Returns 0 if successful, or non-zero if the page table entries
* are not free.
*/
-int gasket_page_table_partition(
- struct gasket_page_table *page_table, uint num_simple_entries);
+int gasket_page_table_partition(struct gasket_page_table *page_table,
+ uint num_simple_entries);
/*
* Get and map [host] user space pages into device memory.
@@ -106,8 +105,8 @@ int gasket_page_table_map(struct gasket_page_table *page_table, ulong host_addr,
*
* Description: The inverse of gasket_map_pages. Unmaps pages from the device.
*/
-void gasket_page_table_unmap(
- struct gasket_page_table *page_table, ulong dev_addr, uint num_pages);
+void gasket_page_table_unmap(struct gasket_page_table *page_table,
+ ulong dev_addr, uint num_pages);
/*
* Unmap ALL host pages from device memory.
@@ -146,9 +145,9 @@ void gasket_page_table_garbage_collect(struct gasket_page_table *page_table);
* Returns 0 if successful, -1 for an error. The page pointer
* and offset are returned through the pointers, if successful.
*/
-int gasket_page_table_lookup_page(
- struct gasket_page_table *page_table, ulong dev_addr,
- struct page **page, ulong *poffset);
+int gasket_page_table_lookup_page(struct gasket_page_table *page_table,
+ ulong dev_addr, struct page **page,
+ ulong *poffset);
/*
* Checks validity for input addrs and size.
@@ -163,9 +162,9 @@ int gasket_page_table_lookup_page(
*
* Returns true if the mapping is bad, false otherwise.
*/
-bool gasket_page_table_are_addrs_bad(
- struct gasket_page_table *page_table, ulong host_addr, ulong dev_addr,
- ulong bytes);
+bool gasket_page_table_are_addrs_bad(struct gasket_page_table *page_table,
+ ulong host_addr, ulong dev_addr,
+ ulong bytes);
/*
* Checks validity for input dev addr and size.
@@ -179,8 +178,8 @@ bool gasket_page_table_are_addrs_bad(
*
* Returns true if the address is bad, false otherwise.
*/
-bool gasket_page_table_is_dev_addr_bad(
- struct gasket_page_table *page_table, ulong dev_addr, ulong bytes);
+bool gasket_page_table_is_dev_addr_bad(struct gasket_page_table *page_table,
+ ulong dev_addr, ulong bytes);
/*
* Gets maximum size for the given page table.
--
2.18.0.345.g5c9ce644c3-goog
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