lkml.org 
[lkml]   [2020]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH RFC PKS/PMEM 45/58] drivers/firmware: Utilize new kmap_thread()
Date
From: Ira Weiny <ira.weiny@intel.com>

These kmap() calls are localized to a single thread. To avoid the over
head of global PKRS updates use the new kmap_thread() call.

Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
drivers/firmware/efi/capsule-loader.c | 6 +++---
drivers/firmware/efi/capsule.c | 4 ++--
2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/efi/capsule-loader.c b/drivers/firmware/efi/capsule-loader.c
index 4dde8edd53b6..aa2e0b5940fd 100644
--- a/drivers/firmware/efi/capsule-loader.c
+++ b/drivers/firmware/efi/capsule-loader.c
@@ -197,7 +197,7 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff,
page = cap_info->pages[cap_info->index - 1];
}

- kbuff = kmap(page);
+ kbuff = kmap_thread(page);
kbuff += PAGE_SIZE - cap_info->page_bytes_remain;

/* Copy capsule binary data from user space to kernel space buffer */
@@ -217,7 +217,7 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff,
}

cap_info->count += write_byte;
- kunmap(page);
+ kunmap_thread(page);

/* Submit the full binary to efi_capsule_update() API */
if (cap_info->header.headersize > 0 &&
@@ -236,7 +236,7 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff,
return write_byte;

fail_unmap:
- kunmap(page);
+ kunmap_thread(page);
failed:
efi_free_all_buff_pages(cap_info);
return ret;
diff --git a/drivers/firmware/efi/capsule.c b/drivers/firmware/efi/capsule.c
index 598b7800d14e..edb7797b0e4f 100644
--- a/drivers/firmware/efi/capsule.c
+++ b/drivers/firmware/efi/capsule.c
@@ -244,7 +244,7 @@ int efi_capsule_update(efi_capsule_header_t *capsule, phys_addr_t *pages)
for (i = 0; i < sg_count; i++) {
efi_capsule_block_desc_t *sglist;

- sglist = kmap(sg_pages[i]);
+ sglist = kmap_thread(sg_pages[i]);

for (j = 0; j < SGLIST_PER_PAGE && count > 0; j++) {
u64 sz = min_t(u64, imagesize,
@@ -265,7 +265,7 @@ int efi_capsule_update(efi_capsule_header_t *capsule, phys_addr_t *pages)
else
sglist[j].data = page_to_phys(sg_pages[i + 1]);

- kunmap(sg_pages[i]);
+ kunmap_thread(sg_pages[i]);
}

mutex_lock(&capsule_mutex);
--
2.28.0.rc0.12.gb6a658bd00c9
\
 
 \ /
  Last update: 2020-10-09 21:58    [W:0.380 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site