[PATCH] avoid unaligned access when accessing poll stack

[pandora-kernel.git] / fs / select.c

diff --git a/fs/select.c b/fs/select.c
index b3a3a13..071660f 100644 (file)
--- a/fs/select.c
+++ b/fs/select.c
@@ -314,7 +314,7 @@ static int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
        int ret, size, max_fdset;
        struct fdtable *fdt;
        /* Allocate small arguments on the stack to save memory and be faster */
-       char stack_fds[SELECT_STACK_ALLOC];
+       long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
 
        ret = -EINVAL;
        if (n < 0)
@@ -639,8 +639,10 @@ int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds, s64 *timeout)
        struct poll_list *walk;
        struct fdtable *fdt;
        int max_fdset;
-       /* Allocate small arguments on the stack to save memory and be faster */
-       char stack_pps[POLL_STACK_ALLOC];
+       /* Allocate small arguments on the stack to save memory and be
+          faster - use long to make sure the buffer is aligned properly
+          on 64 bit archs to avoid unaligned access */
+       long stack_pps[POLL_STACK_ALLOC/sizeof(long)];
        struct poll_list *stack_pp = NULL;
 
        /* Do a sanity check on nfds ... */