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author | David S. Miller <davem@davemloft.net> | 2018-09-18 09:33:27 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2018-09-18 09:33:27 -0700 |
commit | e366fa435032db1ce1538a2c029714666985dd48 (patch) | |
tree | d08bab02ba212339e4cfc0f2e3666435dd795b90 /fs/pstore | |
parent | cf7d97e1e54d71679a8b11716dad9d21deb0e1e2 (diff) | |
parent | 5211da9ca526a5adddee1ccd078e6e33a583ab36 (diff) | |
download | linux-e366fa435032db1ce1538a2c029714666985dd48.tar.gz linux-e366fa435032db1ce1538a2c029714666985dd48.tar.bz2 linux-e366fa435032db1ce1538a2c029714666985dd48.zip |
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
Two new tls tests added in parallel in both net and net-next.
Used Stephen Rothwell's linux-next resolution.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/pstore')
-rw-r--r-- | fs/pstore/ram_core.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 951a14edcf51..0792595ebcfb 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -429,7 +429,12 @@ static void *persistent_ram_vmap(phys_addr_t start, size_t size, vaddr = vmap(pages, page_count, VM_MAP, prot); kfree(pages); - return vaddr; + /* + * Since vmap() uses page granularity, we must add the offset + * into the page here, to get the byte granularity address + * into the mapping to represent the actual "start" location. + */ + return vaddr + offset_in_page(start); } static void *persistent_ram_iomap(phys_addr_t start, size_t size, @@ -448,6 +453,11 @@ static void *persistent_ram_iomap(phys_addr_t start, size_t size, else va = ioremap_wc(start, size); + /* + * Since request_mem_region() and ioremap() are byte-granularity + * there is no need handle anything special like we do when the + * vmap() case in persistent_ram_vmap() above. + */ return va; } @@ -468,7 +478,7 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size, return -ENOMEM; } - prz->buffer = prz->vaddr + offset_in_page(start); + prz->buffer = prz->vaddr; prz->buffer_size = size - sizeof(struct persistent_ram_buffer); return 0; @@ -515,7 +525,8 @@ void persistent_ram_free(struct persistent_ram_zone *prz) if (prz->vaddr) { if (pfn_valid(prz->paddr >> PAGE_SHIFT)) { - vunmap(prz->vaddr); + /* We must vunmap() at page-granularity. */ + vunmap(prz->vaddr - offset_in_page(prz->paddr)); } else { iounmap(prz->vaddr); release_mem_region(prz->paddr, prz->size); |