With GPIO, UART and others, allow specifying the device index via the
aliases node in the device tree.
On embedded devices, there is often a combination of removable (e.g.
SD card) and non-removable MMC devices (e.g. eMMC).
Therefore the index might change depending on
* host of removable device
* removable card present or not
This makes it difficult to hardcode the root device, if it is on the
non-removable device. E.g. if SD card is present eMMC will be mmcblk1,
if SD card is not present at boot, eMMC will be mmcblk0.
Alternative solutions like PARTUUIDs do not cover the case where multiple
mmcblk devices contain the same image. This is a common issue on devices
that can boot both from eMMC (for regular boot) and SD cards (as a
temporary boot medium for development). When a firmware image is
installed to eMMC after a test boot via SD card, there will be no
reliable way to refer to a specific device using (PART)UUIDs oder
LABELs.
The demand for this feature has led to multiple attempts to implement
it, dating back at least to 2012 (see
https://www.spinics.net/lists/linux-mmc/msg26586.html for a previous
discussion from 2014).
All indices defined in the aliases node will be reserved for use by the
respective MMC device, moving the indices of devices that don't have an
alias up into the non-reserved range. If the aliases node is not found,
the driver will act as before.
This is a rebased and cleaned up version of
https://www.spinics.net/lists/linux-mmc/msg26588.html .
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/
Git-commit: fa2d0aa96941e8dc347e49a04c75468e3002ee20_
Change-Id: I88c11705c8b66022e67b38a64bbc91625357a4bc
Based-on-patch-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lkml.org/lkml/2020/8/5/194
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Signed-off-by: Ram Prakash Gupta <rampraka@codeaurora.org>
Use the exported function instead of kallsyms_lookup to get
log_buf size, this can save a lot of time during boot up.
Change-Id: I99fe49e9f014c0a4bb16162d836c38e31236e8ea
Signed-off-by: Mayank Grover <groverm@codeaurora.org>
IRQ workqueue handler should be initialized before irq register,
or that when irq was triggered, could lead a crash.
Change-Id: If5551f622ae58a75ae655d4752bb397af0a00f98
Signed-off-by: Zhao, Yuan <yzhao@codeaurora.org>
cnss2: Increase mhi timeout in debug builds to 30sec from 10sec
for firmware download. Once MHI power On is done then the
timeout is reverted to default 10sec.
Change-Id: Ib18cda6da612d37e69cc6f1fee169f01d994daaa
Signed-off-by: Mohammed Siddiq <msiddiq@codeaurora.org>
There is a race during page offline that can lead to infinite loop:
a page never ends up on a buddy list and __offline_pages() keeps
retrying infinitely or until a termination signal is received.
Thread#1 - a new process:
load_elf_binary
begin_new_exec
exec_mmap
mmput
exit_mmap
tlb_finish_mmu
tlb_flush_mmu
release_pages
free_unref_page_list
free_unref_page_prepare
set_pcppage_migratetype(page, migratetype);
// Set page->index migration type below MIGRATE_PCPTYPES
Thread#2 - hot-removes memory
__offline_pages
start_isolate_page_range
set_migratetype_isolate
set_pageblock_migratetype(page, MIGRATE_ISOLATE);
Set migration type to MIGRATE_ISOLATE-> set
drain_all_pages(zone);
// drain per-cpu page lists to buddy allocator.
Thread#1 - continue
free_unref_page_commit
migratetype = get_pcppage_migratetype(page);
// get old migration type
list_add(&page->lru, &pcp->lists[migratetype]);
// add new page to already drained pcp list
Thread#2
Never drains pcp again, and therefore gets stuck in the loop.
The fix is to try to drain per-cpu lists again after
check_pages_isolated_cb() fails.
Change-Id: I7d9b42fdbf436458242385f795126e42294562b1
Fixes: c52e75935f ("mm: remove extra drain pages on pcp list")
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200903140032.380431-1-pasha.tatashin@soleen.com
Link: https://lkml.kernel.org/r/20200904151448.100489-2-pasha.tatashin@soleen.com
Link: http://lkml.kernel.org/r/20200904070235.GA15277@dhcp22.suse.cz
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-Commit: 9683182612214aa5f5e709fad49444b847cd866a
Git-Repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
Add type casting in alloc_trace_locations to avoid build below warning.
mm/slub.c: In function ‘alloc_trace_locations’:
mm/slub.c:6322:27: warning: format ‘%p’ expects argument of type ‘void *’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
error, forbidden warning: slub.c:6322.
Change-Id: I87e337cc73c36274aaaa8dfd384f3f80f0d2d79d
Signed-off-by: Faiyaz Mohammed <faiyazm@codeaurora.org>
Add pid and page allocated time in page owner dump.
Change-Id: I8ea2b18c14ad887f49fc7b05174169cc1fbb902e
Fixes: 65b0515874 ("mm, page_owner: record time and pid")
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
Avoid returning from slab_sysfs_init if debugfs is off as it is not fatal.
Change-Id: Ice8c26861ad6d6d143e910bb36aeed61dc23cb2f
Signed-off-by: Faiyaz Mohammed <faiyazm@codeaurora.org>
This patch disables the RIMPS timer based PLL/RAIL trigger
timer in core C4 exit so that it stops the RIMPS from ticking
timer when core C4 exit happen before this timer expires.
Change-Id: I74b3e2222dc3ef5ba0fdebd71b7e86201016fc42
Signed-off-by: Raghavendra Kakarla <rkakarla@codeaurora.org>
Check qcg before dereferencing to avoid NULL pointer
dereference and return if its NULL. This is is to
fix below kw warnings.
ufs-qcom.c:2489: 'qcg' is assigned the return value from
function 'cpu_to_group'.
ufs-qcom.c:2439: 'cpu_to_group' explicitly returns
a NULL value.
ufs-qcom.c:2490: 'qcg' is explicitly dereferenced.
Change-Id: I291c9230bb7fb5df414db8f80bfb17a50c8fc7cf
Signed-off-by: Nitin Rawat <nitirawa@codeaurora.org>
Add support for global clock controller for peripheral
clock clients to be able to request for the clocks.
Change-Id: If68b92b5f599c06412434dacb0e438e5d8aaa5f5
Signed-off-by: Jagadeesh Kona <jkona@codeaurora.org>
