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vmw_balloon: fix for a -Wuninitialized warning

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Fix for a -Wuninitialized compiler warning. Changed return value of
vmballoon_send_lock_page() from bool to int to be able to distinguish
between the error cases to avoid uninitialized use of hv_status in
vmballoon_reserve_page()

Signed-off-by: Danny Kukawka <danny.kukawka@bisect.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Danny Kukawka 2012-01-30 23:00:08 +01:00 committed by Greg Kroah-Hartman
parent 7c5763b845
commit 3e5ba466d5
1 changed files with 7 additions and 7 deletions
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14
drivers/misc/vmw_balloon.c
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@ -314,7 +314,7 @@ static bool vmballoon_send_get_target(struct vmballoon *b, u32 *new_target)
* fear that guest will need it. Host may reject some pages, we need to
* check the return value and maybe submit a different page.
*/
static bool vmballoon_send_lock_page(struct vmballoon *b, unsigned long pfn,
static int vmballoon_send_lock_page(struct vmballoon *b, unsigned long pfn,
unsigned int *hv_status)
{
unsigned long status, dummy;
@ -322,17 +322,17 @@ static bool vmballoon_send_lock_page(struct vmballoon *b, unsigned long pfn,
pfn32 = (u32)pfn;
if (pfn32 != pfn)
return false;
return -1;
STATS_INC(b->stats.lock);
*hv_status = status = VMWARE_BALLOON_CMD(LOCK, pfn, dummy);
if (vmballoon_check_status(b, status))
return true;
return 0;
pr_debug("%s - ppn %lx, hv returns %ld\n", __func__, pfn, status);
STATS_INC(b->stats.lock_fail);
return false;
return 1;
}
/*
@ -411,7 +411,7 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
struct page *page;
gfp_t flags;
unsigned int hv_status;
bool locked = false;
int locked;
flags = can_sleep ? VMW_PAGE_ALLOC_CANSLEEP : VMW_PAGE_ALLOC_NOSLEEP;
do {
@ -431,7 +431,7 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
/* inform monitor */
locked = vmballoon_send_lock_page(b, page_to_pfn(page), &hv_status);
if (!locked) {
if (locked > 0) {
STATS_INC(b->stats.refused_alloc);
if (hv_status == VMW_BALLOON_ERROR_RESET ||
@ -449,7 +449,7 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
if (++b->n_refused_pages >= VMW_BALLOON_MAX_REFUSED)
return -EIO;
}
} while (!locked);
} while (locked != 0);
/* track allocated page */
list_add(&page->lru, &b->pages);