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In preparation of not locking at all for certain buffers depending on if
there's contention, make locking optional depending on the initialization
of the prz.
Signed-off-by: Joel Fernandes <joelaf@google.com>
[kees: moved locking flag into prz instead of via caller arguments]
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Joe Maples <joe@frap129.org>
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(from https://lkml.org/lkml/2016/9/1/428)
(cherry pick from android-3.10 commit b58133100b38f2bf83cad2d7097417a3a196ed0b)
Removing a bounce buffer copy operation in the pmsg driver path is
always better. We also gain in overall performance by not requesting
a vmalloc on every write as this can cause precious RT tasks, such
as user facing media operation, to stall while memory is being
reclaimed. Added a write_buf_user to the pstore functions, a backup
platform write_buf_user that uses the small buffer that is part of
the instance, and implemented a ramoops write_buf_user that only
supports PSTORE_TYPE_PMSG.
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 31057326
Change-Id: I4cdee1cd31467aa3e6c605bce2fbd4de5b0f8caa
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fs/pstore/ram.c: In function 'ramoops_probe':
fs/pstore/ram.c:526:6: error: void value not ignored as it ought to be
Change-Id: I8ad52a8955486df59bb8f7d09757fcb8b1a4e036
Signed-off-by: Patrick Tjin <pattjin@google.com>
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In the function ramoops_probe, the console_size, pmsg_size,
ftrace_size may be update because the value is not the power
of two. We should update the module parameter variables
as well so they are visible through /sys/module/ramoops/parameters
correctly.
Change-Id: I18b89758c2e928b29a9e14edecadc80a3c40d8fb
Signed-off-by: Wang Long <long.wanglong@huawei.com>
Acked-by: Mark Salyzyn <salyzyn@android.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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- Add pmsg initialization
- or_property_read_u32 does not set *out value if case
missing. Must initialize _all_ output vars before call.
Based on: I5c9bcb7bd43af5a80addecf824f14dd7d63b0064
Change-Id: I2723d407be1ae77d45ad5486a2ddd13b82c5c588
Signed-off-by: Patrick Tjin <pattjin@google.com>
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configure the start & size of ramoops memory using device tree.
the "dummy" device is no harm as long as initial mem_size is zero.
Conflicts:
fs/pstore/ram.c
Cherry-picked from: bc4df1ea67057fa2117aa6f5b5a967d2ca2cc846
Change-Id: I756e933bea072399cb80ffd78dc79a42b448fed9
Signed-off-by: Yi-wei Zhao <gbjc64@motorola.com>
Reviewed-by: Jeffrey Carlyle <jeff.carlyle@motorola.com>
Signed-off-by: Patrick Tjin <pattjin@google.com>
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