BMC/Intel-BMC/linux.git/drivers/s390/char, branch dev

s390/sclp: fix compile error

2015-07-01T07:34:38+00:00

Fix this error when compiling with CONFIG_SMP=n and CONFIG_DYNAMIC_DEBUG=y: drivers/s390/char/sclp_early.c: In function 'sclp_read_info_early': drivers/s390/char/sclp_early.c:87:19: error: 'EBUSY' undeclared (first use in this function) } while (rc == -EBUSY); ^ Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky

s390/kdump: fix nosmt kernel parameter

2015-06-25T07:39:26+00:00

It turned out that SIGP set-multi-threading can only be done once. Therefore switching to a different MT level after switching to sclp.mtid_prev in the dump case fails. As a symptom specifying the "nosmt" parameter currently fails for the kdump kernel and the kernel starts with multi-threading enabled. So fix this and issue diag 308 subcode 1 call after collecting the CPU states for the dump. Also enhance the diag308_reset() function to be usable also with enabled lowcore protection and prefix register != 0. After the reset it is possible to switch the MT level again. We have to do the reset very early in order not to kill the already initialized console. Therefore instead of kmalloc() the corresponding memblock functions have to be used. To avoid copying the sclp cpu code into sclp_early, we now use the simple sigp loop method for CPU detection. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky

s390/smp: cleanup core vs. cpu in the SCLP interface

2015-06-25T07:39:24+00:00

The SCLP interface to query, configure and deconfigure CPUs actually operates on cores. For a machine without the multi-threading faciltiy a CPU and a core are equivalent but starting with System z13 a core can have multiple hardware threads, also referred to as logical CPUs. To avoid confusion replace the word 'cpu' with 'core' in the SCLP interface. Also replace MAX_CPU_ADDRESS with SCLP_MAX_CORES. The core-id is an 8-bit field, the maximum thread id is in the range 0-31. The theoretical limit for the CPU address is therefore 8191. Signed-off-by: Martin Schwidefsky

s390/keyboard: avoid off-by-one when using strnlen_user()

2015-06-15T08:51:12+00:00

strnlen_user() returns the length of the string including terminating 0. So avoid counting it again and unnecessarily reducing maximum string size by 1. Signed-off-by: Jan Kara Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/sclp: pass timeout as HZ independent value

2015-06-15T08:50:57+00:00

schedule_timeout takes a timeout in jiffies but the code currently is passing in a constant SDIAS_SLEEP_TICKS, as this is otherwise unused it is replaced by 500ms as recommended by Michael Holzheu and converted with msecs_to_jiffies(); As SDIAS_SLEEP_TICKS was only used in this one location it is dropped. Patch was compile tested with (s390) defconfig + CONFIG_MARCH_Z10=y, (implies CONFIG_CRASH_DUMP=y) Patch is against 4.1-rc5 (localversion-next is -next-20150529) Link: http://lkml.org/lkml/2015/5/29/235 Signed-off-by: Nicholas Mc Guire Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/sclp: Use DECLARE_BITMAP

2015-06-15T08:50:33+00:00

Use the generic mechanism to declare a bitmap instead of unsigned long. Signed-off-by: Joe Perches Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/sclp: move sclp_facilities into "struct sclp"

2015-05-13T07:58:18+00:00

Let's also move the facilities into the sclp struct, so we can avoid another separate external variable. Acked-by: Martin Schwidefsky Signed-off-by: David Hildenbrand Signed-off-by: Martin Schwidefsky

s390/sclp: get rid of sclp_get_mtid() and sclp_get_mtid_max()

2015-05-13T07:58:17+00:00

As all relevant sclp data is now directly accessible, let's move the logic of these two functions to the single caller. Acked-by: Martin Schwidefsky Signed-off-by: David Hildenbrand Signed-off-by: Martin Schwidefsky

s390/sclp: unify basic sclp access by exposing "struct sclp"

2015-05-13T07:58:17+00:00

Let's unify basic access to sclp fields by storing the data in an external struct in asm/sclp.h. The values can now directly be accessed by other components, so there is no need for most accessor functions and external variables anymore. The mtid, mtid_max and facility part will be cleaned up separately. Acked-by: Martin Schwidefsky Signed-off-by: David Hildenbrand Signed-off-by: Martin Schwidefsky

s390/3215: free memory in error path

2015-04-23T14:55:50+00:00

If one memory allocation fails, there is a memory leak. Signed-off-by: Christophe Jaillet Signed-off-by: Martin Schwidefsky