linux.git/drivers/staging/zcache/zcache-main.c, branch v3.1

staging: zcache: fix cleancache crash

2011-09-20T21:17:13+00:00

After commit c5f5c4db3938 ("staging: zcache: fix crash on high memory
swap") cleancache crashes on the first successful get.  This was caused
by a remaining virt_to_page() call in zcache_pampd_get_data_and_free()
that only gets run in the cleancache path.

The patch converts the virt_to_page() to struct page casting like was
done for other instances in c5f5c4db3938.

Signed-off-by: Seth Jennings 
Tested-By: Valdis Kletnieks 
Acked-by: Dan Magenheimer 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Linus Torvalds

staging: zcache: fix crash on high memory swap

2011-08-23T21:52:20+00:00

zcache_put_page() was modified to pass page_address(page) instead of the
actual page structure. In combination with the function signature changes
to tmem_put() and zcache_pampd_create(), zcache_pampd_create() tries to
(re)derive the page structure from the virtual address.  However, if the
original page is a high memory page (or any unmapped page), this
virt_to_page() fails because the page_address() in zcache_put_page()
returned NULL.

This patch changes zcache_put_page() and zcache_get_page() to pass
the page structure instead of the page's virtual address, which
may or may not exist.

Signed-off-by: Seth Jennings 
Acked-by: Dan Magenheimer 
Signed-off-by: Greg Kroah-Hartman

zcache: Fix build error when sysfs is not defined

2011-08-08T19:05:35+00:00

Signed-off-by: Nitin Gupta 
Signed-off-by: Greg Kroah-Hartman

zcache: Use div_u64 for 64-bit division

2011-08-08T19:05:34+00:00

xv_get_total_size_bytes returns a u64 value and it's used in a division.
This causes build failures in 32-bit architectures, as reported by Randy
Dunlap.

Reported-by: Randy Dunlap 
Signed-off-by: Thadeu Lima de Souza Cascardo 
Cc: Stephen Rothwell 
Cc: Dan Magenheimer 
Cc: Nitin Gupta 
Acked-by: Randy Dunlap 
Signed-off-by: Greg Kroah-Hartman

staging: zcache: include module.h for MODULE_LICENSE

2011-08-03T14:25:49+00:00

The oncoming cleanup of module.h usage requires the explicit inclusion
of module.h when it was otherwise being included indirectly. Otherwise,
building zcache will fail.

Reported-by: Stephen Rothwell 
Signed-off-by: Thadeu Lima de Souza Cascardo 
Signed-off-by: Greg Kroah-Hartman

staging: zcache: module is GPL

2011-08-02T23:06:18+00:00

This avoids tainting the kernel as if a proprietary module was loaded.
The kernel will still be tainted because this is a staging driver.

Signed-off-by: Thadeu Lima de Souza Cascardo 
Signed-off-by: Greg Kroah-Hartman

staging: fix zcache building

2011-08-02T23:06:18+00:00

zcache is only building tmem.c and not building zcache.c. To keep the
module name, zcache.c must be renamed if symbols from tmem.c are to
remain unexported.

Signed-off-by: Thadeu Lima de Souza Cascardo 
Acked-by: Dan Magenheimer 
Signed-off-by: Greg Kroah-Hartman