mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-03 17:40:04 +00:00
Code Issues Releases Wiki Activity

Xtensa patchset for v3.12-rc6

Browse source 
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJSXuCxAAoJEI9vqH3mFV2sdWwP/11xVQFtzoT01k9P4fZeFCMT
 +dGztMBY6bODMEyeC9raX6sJhuOYNivS2IBFJ4qv9p+kcCplYE0EsB3MfOQ60NdV
 eV2DdnHrPKgIPUutGf7mcZ5bXB8q8HEuEFn0ONsCdNTAxzrcLxaPZU3MeGhSfL0H
 d/RPPmSW8+vLEMWUe58EB2J8Z1DJye4O0pbxskjGA64KrLssKBG3LWBQBdTsihkE
 r2olYYT0j7osJ7loLbyll/CcacQTfJbQT8Xd0Y7MbLYR/G6EVMwb6PkzkFnUPMIQ
 zLwMAOgL8/E250p4ab0Wy8vf9rW+938qR93oZEyO8TRDdF/mYNQb+GK+ZKUrMrxg
 eZ/pOhKQ+xUKtt23xrvbXR3nTnI9AfiJ1nhuO4UmX5WIhyJXDcYYk+rujlEduxGm
 IJ7p5cRWBdqC+iIiSzQJjyW4drIXU6QJ+ureOGo0vBcBJsLRbUFYLt+08Rb60/d1
 zgS8L7DpKRUZlIrbD6/HxyUimJCTGERsvTSDZYCYs1+ri/YKV4a8Ukfsl8bWLbhd
 Le5PyMeusWaM6MHCIOJPys2SpsKGl9UCaVr7Nz1Lr6HIqZJUN61rNVSIcUpufiqt
 hPSYtljmz6746Z6QvNW0OD8+qE5foplCnv94Oqj9tb24gHfINPXkjiaEKhPDICi0
 6cCQj4pCsjjlzXXmn5Fp
 =sopZ
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-next-20131015' of git://github.com/czankel/xtensa-linux

Pull Xtensa patchset from Chris Zankel:
 "The main patch fixes a bug that can cause a kernel panic, and was
  introduced in rc1.  The other two have been discovered by a uclibc
  test and 'coccinelle'"

* tag 'xtensa-next-20131015' of git://github.com/czankel/xtensa-linux:
  xtensa: Cocci spatch "noderef"
  xtensa: don't use alternate signal stack on threads
  xtensa: fix fast_syscall_spill_registers_fixup
This commit is contained in:
Linus Torvalds 2013-10-28 16:58:05 -07:00
commit c9ca72fc56
3 changed files with 33 additions and 21 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

49
arch/xtensa/kernel/entry.S
View file

@ -1122,7 +1122,7 @@ ENDPROC(fast_syscall_spill_registers)
* a3: exctable, original value in excsave1
*/
fast_syscall_spill_registers_fixup:
ENTRY(fast_syscall_spill_registers_fixup)
rsr a2, windowbase # get current windowbase (a2 is saved)
xsr a0, depc # restore depc and a0
@ -1134,22 +1134,26 @@ fast_syscall_spill_registers_fixup:
*/
xsr a3, excsave1 # get spill-mask
slli a2, a3, 1 # shift left by one
slli a3, a3, 1 # shift left by one
slli a3, a2, 32-WSBITS
src a2, a2, a3 # a1 = xxwww1yyxxxwww1yy......
slli a2, a3, 32-WSBITS
src a2, a3, a2 # a2 = xxwww1yyxxxwww1yy......
wsr a2, windowstart # set corrected windowstart
rsr a3, excsave1
l32i a2, a3, EXC_TABLE_DOUBLE_SAVE # restore a2
l32i a3, a3, EXC_TABLE_PARAM # original WB (in user task)
srli a3, a3, 1
rsr a2, excsave1
l32i a2, a2, EXC_TABLE_DOUBLE_SAVE # restore a2
xsr a2, excsave1
s32i a3, a2, EXC_TABLE_DOUBLE_SAVE # save a3
l32i a3, a2, EXC_TABLE_PARAM # original WB (in user task)
xsr a2, excsave1
/* Return to the original (user task) WINDOWBASE.
* We leave the following frame behind:
* a0, a1, a2 same
* a3: trashed (saved in excsave_1)
* a3: trashed (saved in EXC_TABLE_DOUBLE_SAVE)
* depc: depc (we have to return to that address)
* excsave_1: a3
* excsave_1: exctable
*/
wsr a3, windowbase
@ -1159,9 +1163,9 @@ fast_syscall_spill_registers_fixup:
* a0: return address
* a1: used, stack pointer
* a2: kernel stack pointer
* a3: available, saved in EXCSAVE_1
* a3: available
* depc: exception address
* excsave: a3
* excsave: exctable
* Note: This frame might be the same as above.
*/
@ -1181,9 +1185,12 @@ fast_syscall_spill_registers_fixup:
rsr a0, exccause
addx4 a0, a0, a3 # find entry in table
l32i a0, a0, EXC_TABLE_FAST_USER # load handler
l32i a3, a3, EXC_TABLE_DOUBLE_SAVE
jx a0
fast_syscall_spill_registers_fixup_return:
ENDPROC(fast_syscall_spill_registers_fixup)
ENTRY(fast_syscall_spill_registers_fixup_return)
/* When we return here, all registers have been restored (a2: DEPC) */
@ -1191,13 +1198,13 @@ fast_syscall_spill_registers_fixup_return:
/* Restore fixup handler. */
xsr a3, excsave1
movi a2, fast_syscall_spill_registers_fixup
s32i a2, a3, EXC_TABLE_FIXUP
s32i a0, a3, EXC_TABLE_DOUBLE_SAVE
rsr a2, windowbase
s32i a2, a3, EXC_TABLE_PARAM
l32i a2, a3, EXC_TABLE_KSTK
rsr a2, excsave1
s32i a3, a2, EXC_TABLE_DOUBLE_SAVE
movi a3, fast_syscall_spill_registers_fixup
s32i a3, a2, EXC_TABLE_FIXUP
rsr a3, windowbase
s32i a3, a2, EXC_TABLE_PARAM
l32i a2, a2, EXC_TABLE_KSTK
/* Load WB at the time the exception occurred. */
@ -1206,8 +1213,12 @@ fast_syscall_spill_registers_fixup_return:
wsr a3, windowbase
rsync
rsr a3, excsave1
l32i a3, a3, EXC_TABLE_DOUBLE_SAVE
rfde
ENDPROC(fast_syscall_spill_registers_fixup_return)
/*
* spill all registers.

2
arch/xtensa/kernel/signal.c
View file

@ -341,7 +341,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sp = regs->areg[1];
if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! on_sig_stack(sp)) {
if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && sas_ss_flags(sp) == 0) {
sp = current->sas_ss_sp + current->sas_ss_size;
}

3
arch/xtensa/platforms/iss/network.c
View file

@ -737,7 +737,8 @@ static int __init iss_net_setup(char *str)
return 1;
}
if ((new = alloc_bootmem(sizeof new)) == NULL) {
new = alloc_bootmem(sizeof(*new));
if (new == NULL) {
printk("Alloc_bootmem failed\n");
return 1;
}