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linux-sg2042
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firmware: Use kvmalloc for page tables 

This is a minor optimization to use kvmalloc() variant for allocating
the page table for the SG-buffer.  They aren't so big in general, so
kmalloc() would fit often better.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2019-05-20 11:26:45 +02:00 committed by Greg Kroah-Hartman
parent 8f58570b98
commit 993f5d11a9
2 changed files with 5 additions and 4 deletions
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7
drivers/base/firmware_loader/fallback.c
View File

@ -232,7 +232,7 @@ static int map_fw_priv_pages(struct fw_priv *fw_priv)
return -ENOMEM;
/* page table is no longer needed after mapping, let's free */
vfree(fw_priv->pages);
kvfree(fw_priv->pages);
fw_priv->pages = NULL;
return 0;
@ -397,7 +397,8 @@ static int fw_realloc_pages(struct fw_sysfs *fw_sysfs, int min_size)
fw_priv->page_array_size * 2);
struct page **new_pages;
new_pages = vmalloc(array_size(new_array_size, sizeof(void *)));
new_pages = kvmalloc_array(new_array_size, sizeof(void *),
GFP_KERNEL);
if (!new_pages) {
fw_load_abort(fw_sysfs);
return -ENOMEM;
@ -406,7 +407,7 @@ static int fw_realloc_pages(struct fw_sysfs *fw_sysfs, int min_size)
fw_priv->page_array_size * sizeof(void *));
memset(&new_pages[fw_priv->page_array_size], 0, sizeof(void *) *
(new_array_size - fw_priv->page_array_size));
vfree(fw_priv->pages);
kvfree(fw_priv->pages);
fw_priv->pages = new_pages;
fw_priv->page_array_size = new_array_size;
}

2
drivers/base/firmware_loader/main.c
View File

@ -276,7 +276,7 @@ void fw_free_paged_buf(struct fw_priv *fw_priv)
for (i = 0; i < fw_priv->nr_pages; i++)
__free_page(fw_priv->pages[i]);
vfree(fw_priv->pages);
kvfree(fw_priv->pages);
fw_priv->pages = NULL;
fw_priv->page_array_size = 0;
fw_priv->nr_pages = 0;