kernel/linux.git/drivers/misc/sgi-gru, branch v4.7.3

x86/platform/UV: Remove Obsolete GRU MMR address translation

2016-05-04T06:48:51+00:00

Use no-op messages in place of cross-partition interrupts when nacking a put message in the GRU. This allows us to remove MMR's as a destination from the GRU driver. Tested-by: John Estabrook Tested-by: Gary Kroening Tested-by: Nathan Zimmer Signed-off-by: Dimitri Sivanich Signed-off-by: Mike Travis Cc: Andrew Banman Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Len Brown Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Russ Anderson Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20160429215406.012228480@asylum.americas.sgi.com Signed-off-by: Ingo Molnar

mm/gup: Switch all callers of get_user_pages() to not pass tsk/mm

2016-02-16T09:11:12+00:00

We will soon modify the vanilla get_user_pages() so it can no longer be used on mm/tasks other than 'current/current->mm', which is by far the most common way it is called. For now, we allow the old-style calls, but warn when they are used. (implemented in previous patch) This patch switches all callers of: get_user_pages() get_user_pages_unlocked() get_user_pages_locked() to stop passing tsk/mm so they will no longer see the warnings. Signed-off-by: Dave Hansen Reviewed-by: Thomas Gleixner Cc: Andrea Arcangeli Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Kirill A. Shutemov Cc: Linus Torvalds Cc: Naoya Horiguchi Cc: Peter Zijlstra Cc: Rik van Riel Cc: Srikar Dronamraju Cc: Vlastimil Babka Cc: jack@suse.cz Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20160212210156.113E9407@viggo.jf.intel.com Signed-off-by: Ingo Molnar

misc: sgi-gru: fix return of error

2015-10-04T11:55:59+00:00

If kzalloc() fails then gms is NULL and we are returning NULL, but the functions which called this function gru_register_mmu_notifier() are not expecting NULL as the return. They are expecting either a valid pointer or the error code in ERR_PTR. Signed-off-by: Sudip Mukherjee Acked-by: Dimitri Sivanich Signed-off-by: Greg Kroah-Hartman

misc: sgi-gru: gruhandles.c: Remove unused function

2015-10-04T11:55:59+00:00

Remove the function tfh_restart() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist Acked-by: Dimitri Sivanich Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman

misc: sgi-gru: use time_before()

2015-10-04T11:55:59+00:00

To be future-proof and for better readability the time comparisons are modified to use time_before() instead of plain, error-prone math. Signed-off-by: Manuel Schölling Acked-by: Dimitri Sivanich Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman

drivers/misc/sgi-gru: fix possible NULL dereference

2015-09-21T02:33:29+00:00

If mmu_find_ops() returns NULL then we are allocating memory for gms using kzalloc. But kzalloc can return NULL and we were dereferencing gms in gru_dbg(). Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman

drivers/misc/sgi-gru: remove unused variable

2015-09-21T02:27:59+00:00

dw was only assigned some value and was never reused. Signed-off-by: Sudip Mukherjee Acked-by: Dimitri Sivanich Signed-off-by: Greg Kroah-Hartman

drivers/misc/sgi-gru: fix dereference of ERR_PTR

2015-09-21T02:27:59+00:00

gru_alloc_gts() can fail and it can return ERR_PTR(errvalue). We should not dereference it if it has returned error. And incase it has returned error then wait for some time and try again. Signed-off-by: Sudip Mukherjee Acked-by: Dimitri Sivanich Signed-off-by: Greg Kroah-Hartman

drivers/misc/sgi-gru: remove always false condition

2015-09-21T02:27:59+00:00

The member gid in struct gru_dump_chiplet_state_req is unsigned int. So it can never be less than 0. Signed-off-by: Sudip Mukherjee Acked-by: Dimitri Sivanich Signed-off-by: Greg Kroah-Hartman

drivers/misc/sgi-gru: make functions static

2015-09-21T02:27:59+00:00

The functions gru_get_cb_exception_detail_str() and gru_abort() were only called locally from that file. We can make them static. Signed-off-by: Sudip Mukherjee Acked-by: Dimitri Sivanich Signed-off-by: Greg Kroah-Hartman