lkml.org 
[lkml]   [2013]   [Dec]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v1 4/9] staging: android: binder: Add align_helper() macro
Date
This patch adds align_helper() macro that will be used for enforcing
the desired alignment on 64bit systems where the alignment will differ
depending on the userspace used (32bit /64bit).

This patch is a temporary patch that will be extended with 32bit compat
handling.

Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>
---
drivers/staging/android/binder.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
index 16109cd..6719a53 100644
--- a/drivers/staging/android/binder.c
+++ b/drivers/staging/android/binder.c
@@ -140,6 +140,8 @@ module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
binder_stop_on_user_error = 2; \
} while (0)

+#define align_helper(ptr) ALIGN(ptr, sizeof(void *))
+
enum binder_stat_types {
BINDER_STAT_PROC,
BINDER_STAT_THREAD,
@@ -1239,7 +1241,7 @@ static void binder_transaction_buffer_release(struct binder_proc *proc,
if (buffer->target_node)
binder_dec_node(buffer->target_node, 1, 0);

- offp = (size_t *)(buffer->data + ALIGN(buffer->data_size, sizeof(void *)));
+ offp = (size_t *)(buffer->data + align_helper(buffer->data_size));
if (failed_at)
off_end = failed_at;
else
@@ -1472,7 +1474,7 @@ static void binder_transaction(struct binder_proc *proc,
if (target_node)
binder_inc_node(target_node, 1, 0, NULL);

- offp = (size_t *)(t->buffer->data + ALIGN(tr->data_size, sizeof(void *)));
+ offp = (size_t *)(t->buffer->data + align_helper(tr->data_size));

if (copy_from_user(t->buffer->data, tr->data.ptr.buffer, tr->data_size)) {
binder_user_error("%d:%d got transaction with invalid data ptr\n",
@@ -2378,8 +2380,7 @@ retry:
tr.data.ptr.buffer = (void *)t->buffer->data +
proc->user_buffer_offset;
tr.data.ptr.offsets = tr.data.ptr.buffer +
- ALIGN(t->buffer->data_size,
- sizeof(void *));
+ align_helper(t->buffer->data_size);

if (binder_copy_to_user(cmd, &tr, &ptr, sizeof(struct binder_transaction_data)))
return -EFAULT;
--
1.7.9.5


\
 
 \ /
  Last update: 2013-12-04 21:41    [W:0.234 / U:0.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site