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Subject[PATCH 09/20] staging: gasket: gasket page table functions use bool return type
Date
From: Todd Poynor <toddpoynor@google.com>

Convert from int to bool return type for gasket page table functions
that return values used as booleans.

Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
drivers/staging/gasket/gasket_page_table.c | 58 +++++++++++-----------
drivers/staging/gasket/gasket_page_table.h | 8 +--
2 files changed, 33 insertions(+), 33 deletions(-)

diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c
index 36a560c87af36..2a27db658a4e4 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -262,16 +262,16 @@ static void gasket_perform_unmapping(
static void gasket_free_extended_subtable(
struct gasket_page_table *pg_tbl, struct gasket_page_table_entry *pte,
u64 __iomem *att_reg);
-static int gasket_release_page(struct page *page);
+static bool gasket_release_page(struct page *page);

/* Other/utility declarations */
-static inline int gasket_addr_is_simple(
+static inline bool gasket_addr_is_simple(
struct gasket_page_table *pg_tbl, ulong addr);
-static int gasket_is_simple_dev_addr_bad(
+static bool gasket_is_simple_dev_addr_bad(
struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages);
-static int gasket_is_extended_dev_addr_bad(
+static bool gasket_is_extended_dev_addr_bad(
struct gasket_page_table *pg_tbl, ulong dev_addr, uint num_pages);
-static int gasket_is_pte_range_free(
+static bool gasket_is_pte_range_free(
struct gasket_page_table_entry *pte, uint num_entries);
static void gasket_page_table_garbage_collect_nolock(
struct gasket_page_table *pg_tbl);
@@ -558,7 +558,7 @@ int gasket_page_table_lookup_page(
}

/* See gasket_page_table.h for description. */
-int gasket_page_table_are_addrs_bad(
+bool gasket_page_table_are_addrs_bad(
struct gasket_page_table *pg_tbl, ulong host_addr, ulong dev_addr,
ulong bytes)
{
@@ -567,7 +567,7 @@ int gasket_page_table_are_addrs_bad(
pg_tbl,
"host mapping address 0x%lx must be page aligned",
host_addr);
- return 1;
+ return true;
}

return gasket_page_table_is_dev_addr_bad(pg_tbl, dev_addr, bytes);
@@ -575,7 +575,7 @@ int gasket_page_table_are_addrs_bad(
EXPORT_SYMBOL(gasket_page_table_are_addrs_bad);

/* See gasket_page_table.h for description. */
-int gasket_page_table_is_dev_addr_bad(
+bool gasket_page_table_is_dev_addr_bad(
struct gasket_page_table *pg_tbl, ulong dev_addr, ulong bytes)
{
uint num_pages = bytes / PAGE_SIZE;
@@ -584,7 +584,7 @@ int gasket_page_table_is_dev_addr_bad(
gasket_pg_tbl_error(
pg_tbl,
"mapping size 0x%lX must be page aligned", bytes);
- return 1;
+ return true;
}

if (num_pages == 0) {
@@ -592,7 +592,7 @@ int gasket_page_table_is_dev_addr_bad(
pg_tbl,
"requested mapping is less than one page: %lu / %lu",
bytes, PAGE_SIZE);
- return 1;
+ return true;
}

if (gasket_addr_is_simple(pg_tbl, dev_addr))
@@ -1285,23 +1285,23 @@ static void gasket_free_extended_subtable(
/*
* Safely return a page to the OS.
* @page: The page to return to the OS.
- * Returns 1 if the page was released, 0 if it was
+ * Returns true if the page was released, false if it was
* ignored.
*/
-static int gasket_release_page(struct page *page)
+static bool gasket_release_page(struct page *page)
{
if (!page)
- return 0;
+ return false;

if (!PageReserved(page))
SetPageDirty(page);
put_page(page);

- return 1;
+ return true;
}

/* Evaluates to nonzero if the specified virtual address is simple. */
-static inline int gasket_addr_is_simple(
+static inline bool gasket_addr_is_simple(
struct gasket_page_table *pg_tbl, ulong addr)
{
return !((addr) & (pg_tbl)->extended_flag);
@@ -1317,7 +1317,7 @@ static inline int gasket_addr_is_simple(
* address to/from page + offset) and that the requested page range starts and
* ends within the set of currently-partitioned simple pages.
*/
-static int gasket_is_simple_dev_addr_bad(
+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);
@@ -1328,7 +1328,7 @@ static int gasket_is_simple_dev_addr_bad(
pg_tbl, 1, page_index, page_offset) != dev_addr) {
gasket_pg_tbl_error(
pg_tbl, "address is invalid, 0x%lX", dev_addr);
- return 1;
+ return true;
}

if (page_index >= pg_tbl->num_simple_entries) {
@@ -1336,7 +1336,7 @@ static int gasket_is_simple_dev_addr_bad(
pg_tbl,
"starting slot at %lu is too large, max is < %u",
page_index, pg_tbl->num_simple_entries);
- return 1;
+ return true;
}

if (page_index + num_pages > pg_tbl->num_simple_entries) {
@@ -1344,10 +1344,10 @@ static int gasket_is_simple_dev_addr_bad(
pg_tbl,
"ending slot at %lu is too large, max is <= %u",
page_index + num_pages, pg_tbl->num_simple_entries);
- return 1;
+ return true;
}

- return 0;
+ return false;
}

/*
@@ -1359,7 +1359,7 @@ static int gasket_is_simple_dev_addr_bad(
* @dev_addr: The device address to which the pages will be mapped.
* @num_pages: The number of second-level/sub pages in the range to consider.
*/
-static int gasket_is_extended_dev_addr_bad(
+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 */
@@ -1373,7 +1373,7 @@ static int gasket_is_extended_dev_addr_bad(
if (addr >> (GASKET_EXTENDED_LVL0_WIDTH + GASKET_EXTENDED_LVL0_SHIFT)) {
gasket_pg_tbl_error(pg_tbl, "device address out of bound, 0x%p",
(void *)dev_addr);
- return 1;
+ return true;
}

/* Find the starting sub-page index in the space of all sub-pages. */
@@ -1391,7 +1391,7 @@ static int gasket_is_extended_dev_addr_bad(
pg_tbl, 0, page_global_idx, page_offset) != dev_addr) {
gasket_pg_tbl_error(
pg_tbl, "address is invalid, 0x%p", (void *)dev_addr);
- return 1;
+ return true;
}

if (page_lvl0_idx >= pg_tbl->num_extended_entries) {
@@ -1399,7 +1399,7 @@ static int gasket_is_extended_dev_addr_bad(
pg_tbl,
"starting level 0 slot at %lu is too large, max is < "
"%u", page_lvl0_idx, pg_tbl->num_extended_entries);
- return 1;
+ return true;
}

if (page_lvl0_idx + num_lvl0_pages > pg_tbl->num_extended_entries) {
@@ -1408,10 +1408,10 @@ static int gasket_is_extended_dev_addr_bad(
"ending level 0 slot at %lu is too large, max is <= %u",
page_lvl0_idx + num_lvl0_pages,
pg_tbl->num_extended_entries);
- return 1;
+ return true;
}

- return 0;
+ return false;
}

/*
@@ -1425,17 +1425,17 @@ static int gasket_is_extended_dev_addr_bad(
*
* The page table mutex must be held before this call.
*/
-static int gasket_is_pte_range_free(
+static bool gasket_is_pte_range_free(
struct gasket_page_table_entry *ptes, uint num_entries)
{
int i;

for (i = 0; i < num_entries; i++) {
if (ptes[i].status != PTE_FREE)
- return 0;
+ return false;
}

- return 1;
+ return true;
}

/*
diff --git a/drivers/staging/gasket/gasket_page_table.h b/drivers/staging/gasket/gasket_page_table.h
index 720ce2bc2c012..0e8afdb8c1139 100644
--- a/drivers/staging/gasket/gasket_page_table.h
+++ b/drivers/staging/gasket/gasket_page_table.h
@@ -162,9 +162,9 @@ int gasket_page_table_lookup_page(
* specified by both addresses and the size are valid for mapping pages into
* device memory.
*
- * Returns 1 if true - if the mapping is bad, 0 otherwise.
+ * Returns true if the mapping is bad, false otherwise.
*/
-int gasket_page_table_are_addrs_bad(
+bool gasket_page_table_are_addrs_bad(
struct gasket_page_table *page_table, ulong host_addr, ulong dev_addr,
ulong bytes);

@@ -178,9 +178,9 @@ int gasket_page_table_are_addrs_bad(
* specified by the device address and the size is valid for mapping pages into
* device memory.
*
- * Returns 1 if true - if the address is bad, 0 otherwise.
+ * Returns true if the address is bad, false otherwise.
*/
-int gasket_page_table_is_dev_addr_bad(
+bool gasket_page_table_is_dev_addr_bad(
struct gasket_page_table *page_table, ulong dev_addr, ulong bytes);

/*
--
2.18.0.233.g985f88cf7e-goog
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