Randy.Dunlap wrote:
sn9c102_v4l2_ioctl() is the second largest stack user that
I find (on i386, after joydump_connect()).
This patch just moves the large stack items to separate
functions so that gcc does not accumulate all of them
onto the stack at one time.
Signed-off-by: Randy Dunlap <[EMAIL PROTECTED]>
diffstat:=
drivers/usb/media/sn9c102_core.c | 493
++++++++++++++++++++-------------------
1 files changed, 255 insertions(+), 238 deletions(-)
Sorry, I meant to document that struct sizes that I moved.
ioctl function stack usage before changes: 1812 bytes
after changes: 680 bytes
structs moved to their own functions:
struct v4l2_capability cap; // 104 bytes
struct v4l2_format format; // 204 bytes
struct v4l2_jpegcompression jc; // 150 bytes
struct v4l2_streamparm sp; // 204 bytes
--
~Randy
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